Caterpillarwheel tractor-scrapertowed scraper

Caterpillar TS220

Maintenance schedule, common problems & OEM parts breakdown

The Cat TS220 is a two-wheel towed scraper, a pull-type earthmoving implement with no engine, transmission, cooling system, or fuel tank of its own. It is hitched to and powered entirely by a separate towing tractor: a single Cat D8-class track-type tractor or a tandem-hitched pair topped by a D10-class tractor, or a Challenger MTS800/900-series wheeled tractor delivering roughly 298 to 373 kW (400 to 500 hp) in single-hookup configuration and 373 to 447 kW (500 to 600 hp) in tandem configuration. Heaped bowl capacity runs 18.0 m3 (23.5 yd3), struck capacity 13.0 m3 (17 yd3), rated payload 25,580 kg (56,400 lb), and empty weight 13,145 kg (28,980 lb). Caterpillar added the TS220 to its lineup in 2009 following its 2008 acquisition of E-Ject Systems, an Iowa-built pull-scraper line, and it carries serial prefix E1L. It shares a combined operation and parts scheme with three siblings: the smaller two-wheel TS180, and the four-wheel, walking-beam TS185 and TS225.

Unlike many Cat machines, the TS220 has not gone through engine- or drivetrain-driven generation splits, since it has neither. What differs across the towed-scraper family is wheel count, suspension, and size tier rather than powertrain: two-wheel TS180/TS220 versus four-wheel walking-beam TS185/TS225, with the TS220 sitting as the larger of the two-wheel pair. Because bowl, apron, and ejector functions all draw off the towing tractor's hydraulic system, the scraper itself stays mechanically simple: wheel hubs, dry-disc brakes, cylinders, and a heavy hitch structure. That simplicity is exactly why the TS220 holds value in the used and parts market today — long service life on the box-section chassis and wear plates, predictable wear-part turnover on cutting edges, cylinder seals, hub seals, and brake components, and a documentation set shared across the TS180/185/220/225 family that keeps parts lookups straightforward for shops supporting mixed towed-scraper fleets.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar TS220 specifications

Engine

Power source	No onboard engine. The TS220 is a towed implement pulled by a separate tractor - large Cat track-type tractors or Challenger Special Application tractors are the intended pulling units; other high-horsepower agricultural tractors (wheel or rubber-track) can also be used with the correct drawbar/hitch.
Emissions tier	Not applicable - no engine fitted to the scraper itself.

Weights

Empty (shipping) weight	13,145 kg (28,980 lb)
Rated load	25,580 kg (56,400 lb)
Loaded weight at rated load	approx. 38,725 kg (85,380 lb), empty weight plus rated load
Weight distribution, empty	28% on the tongue, 72% on the axle

Dimensions

Length, maximum	9677 mm (381 in / 31 ft 9 in)
Height, overall shipping	2464 mm (97 in)
Width, inside of bowl	3353 mm (132 in)
Width of cut, to router bits	3480 mm (11 ft 5 in)
Ground to cutting edge, maximum	698 mm (27.5 in)
Hitch pin diameter	89 mm (3.5 in), retained by eight bolts. Note: one older press write-up cites a 165 mm hitch pin - treat the 89 mm figure from the current factory spec sheet as authoritative and verify against the specific hitch kit fitted.
Tires, standard	875/65R29, two tires fitted

Performance

Scraper bowl capacity, heaped	18.0 m³ (23.5 yd³)
Scraper bowl capacity, struck	13.0 m³ (17 yd³)
Depth of cut, maximum	262 mm (10.3 in)
Depth of spread, maximum	737 mm (29 in)
Front bowl cylinder	140 mm (5.5 in) bore x 508 mm (20 in) stroke
Brakes	Dry-disc, four calipers, standard
Travel speed	Not published for the scraper itself - travel speed is governed by the towing tractor, not the implement.
Gradeability	Not published - passive towed implement with no independent traction rating.

Service capacities (summary)

Fuel tank, engine oil, cooling system	Not applicable - the TS220 carries no engine, so these capacities are not published for the scraper; refer to the pulling tractor's own service capacities.
Hydraulic system	Not documented in available factory spec sheets for this exact configuration - verify with your dealer.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

TS220 fluids & capacities

System	Capacity	Recommended fluid
Engine crankcase (with filter)	Not applicable — the TS220 carries no onboard engine	None. This is a passive two-wheel towed scraper with no engine of its own; engine oil and filter service follow the schedule of whatever prime mover tows it (a Cat track-type tractor or a Challenger-type wheeled/tracked ag tractor).
Cooling system	Not applicable — no onboard engine or radiator	None. Coolant service belongs to the towing tractor, not the scraper.
Fuel tank	Not applicable — the scraper carries no fuel tank	None.
Transmission / powertrain compartment	Not applicable — no onboard transmission, torque converter, or final-drive gearbox	None. Motive power and drivetrain come entirely from the towing tractor; the scraper itself is unpowered.
Wheel hubs (two, oil-filled, Duo-Cone sealed)	Fill quantity per hub not documented in available sources for this exact model — verify against the TS220 lubrication chart before service	Sealed wheel-hub reservoirs of this design are normally serviced with a Cat drivetrain-grade oil, comparable to Cat TDTO (Tractor Hydraulic/Transmission/Drive Train Oil). Exact grade and any cold/hot climate viscosity split were not confirmed for the TS220 specifically — check the machine-specific OMM or a dealer before topping up.
Bowl / apron / ejector hydraulic system	No dedicated onboard hydraulic tank — the scraper has no reservoir of its own	Bowl lift, apron, and ejector cylinders draw hydraulic oil from the towing tractor's hydraulic system through supply and return hoses. Fluid type, viscosity grade, and capacity are set by the towing tractor's own OMM, not by a scraper-specific spec.
Service brakes	Dry-disc brakes — not a fluid-filled system, no brake oil reservoir on the scraper	No brake fluid or oil capacity applies. Brake actuation is linked to the towing tractor's brake circuit per the coupling configuration used.
Grease points (hitch pin/bushing, bowl and apron pivots, ejector linkage, tandem hookup hardware)	Spec-only — multi-point chassis service, no fill volume; interval per the lubrication chart	General-purpose Cat chassis grease (Cat Extreme Application Grease or an equivalent NLGI multipurpose grease) is standard practice for this class of pin-and-bushing service. The exact grade called out in the TS220 lubrication chart was not located in available sources — confirm before service.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar TS220 maintenance schedule

Service interval	Tasks
Every 10 h	Walk the hitch and check the pin, UHMW guide blocks, and stop blocks for movement, cracking, or abnormal wear Wipe down and inspect bowl, apron, and ejector cylinder rod seals for weeping or fresh oil film Check hydraulic supply hoses and quick-couplers at the hitch crossover for chafing, kinks, or leaks Look over the cutting edge and bowl-floor wear plates for gouging, cracking, or uneven wear Grease hitch pivot points and cylinder pin bushings per the chassis lube chart Check the wheel-hub oil sight glass on both hubs and look for Duo-Cone seal weeping at the hub face
Every 250 h	Torque-check hitch mounting hardware and pin retainer bolts Measure dry-disc brake pad and disc wear against service limits Inspect tandem hookup hardware, including the steel brake and hydraulic lines routed inside the bowl walls, for chafe points and secure clamping Cycle the bowl, apron, and ejector through a full stroke and time the movement to catch early cylinder seal drift Check wheel bearing end play and hub retention at both wheel stations
Every 500 h	Pull a wheel-hub oil sample from both hubs for lab analysis and change if condition flags contamination or water intrusion Inspect the brake actuation linkage and hydraulic brake valve for wear or sticking Re-torque wheel rim clamping bolts to spec Inspect UHMW hitch guide blocks for wear and replace any pair below service thickness Check ejector cylinder cushioning and mounting pin bushings for play
Every 1,000 h	Change wheel-hub oil in both Duo-Cone-sealed hubs regardless of sample results Pull dry-disc brake components for inspection and replace pads approaching the wear limit Check the hitch pin bore and bushing for elongation and replace the pin if wear exceeds spec Run a cylinder drift test on the bowl, apron, and ejector circuits to catch internal seal bypass Check cutting-edge mounting hardware and measure bowl-floor wear-plate thickness, rotating or replacing sections as needed
Every 2,000 h	Overhaul seal kits on the bowl, apron, and ejector cylinders Replace wheel-hub Duo-Cone seals as a set even if not yet leaking Inspect the hitch tongue structure and stop blocks for fatigue cracking around weld toes Replace hydraulic supply hoses at the hitch crossover as a preventive measure given their duty cycle Pull the brake calipers and discs for a full inspection and rebuild worn components
Every 4,000 h	Replace bowl floor and side-wall wear plates once base steel is exposed Rebuild both wheel-hub assemblies, including bearings, races, and seals Replace cutting edges down to mounting hardware once worn to the wear indicator line Inspect the main box-section chassis and hitch structure for fatigue cracking at load-bearing welds Replace the hitch pin and bushings as a matched set regardless of measured wear

Servicing the TS220 beyond the schedule

Predictive Maintenance & Fluid Analysis on the TS220

Since the TS220 has no engine oil to sample, predictive work centers on wheel-hub oil analysis: water intrusion or metal in the sample flags a failing Duo-Cone seal before it weeps externally. Time the bowl, apron, and ejector cylinder strokes at each interval; a slowing cycle or drift under load signals internal seal bypass. Track hitch pin and UHMW guide block wear trends, and inspect the hydraulic supply hoses at the hitch crossover, since they carry the towing tractor's full system pressure to a moving joint.

Corrective & Common Repairs on the TS220

Most corrective work on the TS220 is wear-driven: cutting-edge and bowl-floor wear-plate replacement from abrasive loading, UHMW hitch guide block swaps, and cylinder seal kit replacement on the bowl, apron, or ejector rams when drift shows up on a stroke test. Hydraulic hose and ORFS coupler replacement at the hitch crossover is routine given the flexing and abrasion that joint sees. Dry-disc brake pad and disc replacement rounds out the common repair list, since braking is the only friction wear system onboard.

Overhaul & Rebuild Points on the TS220

Major rebuild work targets the wheel-hub assemblies (bearings, races, and Duo-Cone seals), the hitch pin and bushings as a matched set, and full cylinder rebuilds on the bowl, apron, and ejector rams including rod and bushing wear. Bowl floor and side-wall wear-plate replacement becomes a structural job once base steel shows through the abrasion-resistant liner. On tandem-hookup units, also inspect the steel brake and hydraulic lines routed inside the bowl walls for fatigue at their mounting brackets during any structural overhaul.

Seasonal & Environment Servicing for the TS220

Abrasive or high-silica soils accelerate cutting-edge and bowl-floor wear-plate loss, so shorten wear-plate inspection intervals in those conditions. In cold weather, confirm wheel-hub oil grade suits ambient temperatures and check Duo-Cone seals for cold-set leakage on startup. In wet or muddy ground, flush and repack chassis grease points more often and check the hitch crossover hoses for packed mud that can mask chafing. Before seasonal storage, fully cycle the bowl, apron, and ejector cylinders and leave them retracted to limit rod corrosion.

TS220 attachments & work tools

Scraper bowl / cutting edges

Standard reversible cutting edges (180-degree rotate to double service life) and router bits. Bowl floor, walls, ejector and apron are high-strength abrasion-resistant steel; width of cut is about 3.48 m (11 ft 5 in). Heaped bowl capacity is 18 m3 (23.5 yd3), struck capacity 13 m3 (17 yd3).

Drawn-implement hitch adapter

An adapter converts the scraper hitch to pull other drawn implements in place of the bowl, such as disk harrows or sheepsfoot compactor rollers, for secondary earthworking passes.

Tandem push-pull hitch

Lead units carry a countersunk tandem hitch in the push block so a second scraper can be push-loaded without a dedicated pusher tractor. The oscillating pin hitch (about 89 mm / 3.5 in pin) allows roughly 45 degrees of roll, 90 degrees of yaw and 27 degrees of pitch, with an integrated stop block protecting the tractor on tight turns.

Prime-mover / tractor pairing

A single scraper is sized for a D8-class Cat track-type tractor or a Challenger MTS800/MTS900 series rubber-tracked or wheeled tractor in roughly the 298 to 373 kW (400 to 500 hp) range. Tandem (push-pull) pairs step up to a D10-class track-type tractor or a tractor in roughly the 373 to 447 kW (500 to 600 hp) range; figures vary by configuration.

Hydraulic hookup / hose kit

A single scraper runs on two hydraulic services (bowl, apron and ejector cylinders); tandem pairs need four. Cat XT-3 ES abrasion-resistant hose with ORFS fittings is standard, with 19 mm poppet-style couplers standard and 13 mm or threaded flat-face quick-connect couplers offered as options. An optional hose-hanging tower kit is available for Challenger MTS800/900 series tractors.

Cushion hitch (optional)

Optional hitch upgrade adds hydraulic accumulators to absorb shock loading when the scraper is towed at transport speed behind a wheeled or rubber-tracked tractor.

Track-guide kit (optional)

Rubber track guides for Challenger MTS800 series tractors keep the track riding on the roller wheels and reduce detracking risk while towing the scraper.

Brakes and running gear

Standard heavy-duty dry-disc brakes use four calipers (two per side, front and rear). Standard tires are 875/65R29 radials on five-piece rims with oil-filled hubs sealed by Cat Duo-Cone seals; a spare rim is offered as a factory option.

All TS220 assemblies by section

Every catalogued assembly group for the Caterpillar TS220. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Braking System

345-9050 Brake Gp-Hyd Caliper Service

15***36	Brake Group-Service	4
34***50	Brake Group-Hydraulic Caliper Service	1
3J***07	Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve	4
6G***32	Adapter	4

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157-8236 Brake Gp-Service

14***46	Kit-Seal	1
14***48	Cover	1
14***58	Seal	3
15***36	Brake Group-Service	1

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334-2712 Lines Gp-Brake -Trailing

12***97	Hose As	1
14***97	Hose As	1
14***27	Connector Group	2
14***66	Elbow Group	1

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331-2690 Lines Gp-Brake -Lead

12***97	Hose As	1
14***36	Adapter; (Straight) (-6 Orb X -6 Orfs)	2
14***66	Elbow Group	1
14***77	Elbow As.	2

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Frame And Body

320-4697 Hitch Gp

10***64	Bearing	3
1A***63	Bolt, Hex, Hd., 3/4"-10 N.C. X 2 1/2"	6
2J***37	Pin	1
2J***46	Ring	3

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331-2663 Hitch Gp-Towing -Lead

03***82	Bolt-12 Point Head; (5/8-11x2.5-In)	8
18***00	Canister-Storage	1
32***61	Block	1
32***49	Tongue As	1

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345-9046 Hitch Gp-Towing -Trailing

03***82	Bolt-12 Point Head; (5/8-11x2.5-In)	8
18***00	Canister-Storage	1
32***61	Block	1
32***72	Cap	2

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341-3271 Hitch Gp-Towing

32***32	Drawbar As	1
32***58	Plate As	1
32***92	Pin	1
33***33	Clamp	1

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320-4531 Hitch Gp-Towing

32***31	Hitch Group-Towing	1
32***92	Pin	1
33***33	Clamp	1
34***89	Bracket As	1

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334-2716 Lines Gp-Lubrication

16***97	Connector As	4
33***16	Lines Group-Lubrication	1
33***46	Hose As	2
6V***97	Seal (Later Machines And Field Installed)	1

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345-0461 Support Gp-Lines

34***77	Mount As	1
34***87	Washer-Thrust	1
34***61	Support Group-Lines	1
34***62	Arm As; (Hitch)	1

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341-3288 Support Gp-Lines

34***77	Mount As	1
34***78	Arm As	1
34***87	Washer-Thrust	1
34***88	Support Group-Lines	1

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353-5366 Support Gp-Lines

32***17	Mount As	1
33***74	Arm As	1
35***66	Support Group-Lines	1
5P***24	Bolt-Plt; (1/2unc X 2 1/4)	2

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Hydraulic System

320-4529 Control Ar-Hydraulic -Lead

32***29	Control Ar-Hydraulic; -Lead	1
33***55	Cylinder Group-Bowl	1
33***56	Cylinder Group-Apron	1
33***64	Cylinder & Mtg Group-Ejector	1

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320-4535 Control Ar-Hydraulic -Trailing

32***35	Control Ar-Hydraulic; -Trailing	1
33***55	Cylinder Group-Bowl	1
33***56	Cylinder Group-Apron	1
33***64	Cylinder & Mtg Group-Ejector	1

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331-2664 Cylinder & Mtg Gp-Ejector

32***27	Plate	4
32***93	Pin	1
32***94	Pin	1
33***64	Cylinder & Mtg Group-Ejector	1

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331-2656 Cylinder Gp-Apron

2H***06	Setscrew-Socket; (1/2-13x1-In)	2
32***27	Plate	6
32***95	Pin	2
32***96	Pin	2

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331-2655 Cylinder Gp-Bowl

32***27	Plate	4
32***98	Pin	4
33***38	Washer; (60.33x101.6x4.76-mm Thk)	8
33***55	Cylinder Group-Bowl	1

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338-5213 Fitting Gp-Quick Disconnect -Lead

23***83	Connector	1
23***84	Connector As	4
33***96	Coupler-Quick	1
33***98	Cap-Dust	4

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338-5016 Fitting Gp-Quick Disconnect -Lead

14***27	Connector Group	8
15***71	Cap-Dust	8
33***44	Coupler	8
33***98	Coupler-Quick	1

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338-5211 Fitting Gp-Quick Disconnect -Lead

14***27	Connector Group	8
33***95	Connector-Quick	8
33***98	Coupler-Quick	1
33***00	Cap-Dust	8

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338-5022 Fitting Gp-Quick Disconnect -Lead

14***27	Connector Group	8
15***27	Cap-Dust	8
15***90	Fitting As	8
33***98	Coupler-Quick	1

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338-5023 Fitting Gp-Quick Disconnect -Trailing

14***27	Connector Group	4
15***27	Cap-Dust	4
15***90	Fitting As	4
33***98	Coupler-Quick	1

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338-5024 Fitting Gp-Quick Disconnect -Lead

15***28	Plug-Dust	4
23***83	Connector	1
23***84	Connector As	4
33***93	Coupler-Quick	4

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338-5684 Fitting Gp-Quick Disconnect -Trailing

33***97	Connector-Quick	4
33***98	Cap-Dust	4
33***84	Fitting Group-Quick Disconnect; -Trailing	1

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338-5212 Fitting Gp-Quick Disconnect -Trailing

14***27	Connector Group	4
33***95	Connector-Quick	4
33***98	Coupler-Quick	1
33***00	Cap-Dust	4

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338-5018 Fitting Gp-Quick Disconnect -Lead

23***83	Connector	1
23***84	Connector As	4
33***97	Coupler-Quick	4
33***96	Coupler-Quick	1

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338-5683 Fitting Gp-Quick Disconnect -Lead

33***97	Connector-Quick	8
33***98	Cap-Dust	8
33***83	Fitting Group-Quick Disconnect; -Lead	1

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338-5017 Fitting Gp-Quick Disconnect -Trailing

14***22	Adapter; (-10orb/-12orfs)	4
15***98	Fitting As	4
15***71	Cap-Dust	4
2M***80	Seal--To Connector Pump Outlet	1

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334-2709 Lines Gp-Apron -Trailing

13***38	Connector	1
14***15	Connector As	4
14***60	Elbow Group	2
14***76	Elbow As	1

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331-2687 Lines Gp-Apron -Lead

13***38	Connector	1
14***15	Connector As	4
14***60	Elbow Group	2
14***76	Elbow As	1

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334-2688 Lines Gp-Bowl Cylinder -Lead

14***15	Connector As	4
14***22	Adapter; (-10orb/-12orfs)	2
15***37	Elbow As	2
15***48	Elbow As	2

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331-2686 Lines Gp-Ejector -Lead

14***27	Connector Group	3
14***47	Elbow; (-12 Orb/Orfs)	3
14***60	Elbow Group	2
14***78	Elbow, 90°,-6 Orb /-6 Orfs; (90°) (-6 Orbx-6orfs)	1

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334-2708 Lines Gp-Ejector -Trailing

14***27	Connector Group	3
14***47	Elbow; (-12 Orb/Orfs)	3
14***60	Elbow Group	2
14***78	Elbow, 90°,-6 Orb /-6 Orfs; (90°) (-6 Orbx-6orfs)	1

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334-2719 Lines Gp-Hydraulic -Lead

33***19	Lines Group-Hydraulic; -Lead	1
34***58	Plate	1
34***63	Clevis	2
34***65	Spring	1

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331-2691 Lines Gp-Rear Attachment -Lead

14***47	Elbow; (-12 Orb/Orfs)	6
14***67	Elbow Group; (Each Includes)	1
14***76	Elbow As	2
14***92	Elbow; (-12 Orfs/-12 Orfs Swivel)	4

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345-9056 Manifold Gp-Hydraulic -Rh

34***56	Manifold Group-Hydraulic; -Rh	1
34***57	Manifold As-Hydraulic	1
4M***25	B. 5/16 N.C. X 1"	2
6V***88	Nut-Full (1/2-13 Thd); (1/2-13-Thd)(Full)	1

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345-9048 Manifold Gp-Hydraulic -Lh, Lead

34***48	Manifold Group-Hydraulic; -Lh, Lead	1
34***49	Manifold As-Hydraulic	1
4M***25	B. 5/16 N.C. X 1"	2
6V***88	Nut-Full (1/2-13 Thd); (1/2-13-Thd)(Full)	1

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Implements

331-2660 Apron Gp

32***51	Apron As	1
33***60	Apron Group	1
34***59	Trunnion	2
5P***66	Capscrew; (Hex Hd) (1/2-13 Nc X 1 1/2) (Gd 8 Z)	16

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320-4237 Bowl Gp-Scraper -Lead

32***93	Plate	2
32***95	Plate	1
32***37	Bowl Group-Scraper; -Lead	1
32***38	Bowl As	1

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320-4574 Bowl Gp-Scraper -Trailing

32***93	Plate	2
32***95	Plate	1
32***25	Guard-Hood	1
32***26	Plate	2

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331-2661 Ejector Gp

32***70	Ejector As	1
32***85	Plate	4
32***86	Plate	2
33***61	Ejector Group	1

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334-2732 Roller & Mtg Gp-Ejctr Carrier

32***94	Roller Group-Ejector Carrier	2
33***32	Roller & Mtg Group-Ejctr Carrier	1
6V***82	Nut-Full (3/4-10 Thd)	2
8T***11	Bolt-Plt; (3/4unc X 4 1/2)	2

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320-4394 Roller Gp-Ejector Carrier

19***12	Seal-O-Ring	1
22***76	Housing-Bearing	1
22***78	Wheel	1
22***79	Cap	1

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Machine Arrangement

320-3870 General Ar-Scraper -Trailing

32***70	General Ar-Scraper; -Trailing	1
32***78	Scraper Ar; -Trailing	1
32***28	Wheel & Brake Ar	1
32***35	Control Ar-Hydraulic; -Trailing	1

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320-3869 General Ar-Scraper -Lead

32***69	General Ar-Scraper; -Lead	1
32***77	Scraper Ar; -Lead	1
32***28	Wheel & Brake Ar	1
32***29	Control Ar-Hydraulic; -Lead	1

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320-3877 Scraper Ar -Lead

32***77	Scraper Ar; -Lead	1
32***37	Bowl Group-Scraper; -Lead	1
33***63	Hitch Group-Towing; -Lead	1
33***32	Roller & Mtg Group-Ejctr Carrier	1

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320-3878 Scraper Ar -Trailing

32***78	Scraper Ar; -Trailing	1
32***74	Bowl Group-Scraper; -Trailing	1
33***32	Roller & Mtg Group-Ejctr Carrier	1
34***46	Hitch Group-Towing; -Trailing	1

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Power Train

328-7662 Rim Gp-Demountable

32***61	Rim As	1
32***62	Rim Group-Demountable	1
3D***52	Ring-Lock	1
3F***94	Flange	2

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338-1028 Rim Gp-Demountable

2D***44	Seal-O-Ring	1
2D***07	Stud	1
2D***08	Grommmet	1
2D***09	Locknut; (11/16-16-Thd)	1

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338-1030 Tire & Rim Ar

33***25	Tire; (875/65-R29)	2
33***28	Rim Group-Demountable	2
33***30	Tire & Rim Ar	1
34***14	Mounting Group-Rim	4

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320-4528 Wheel & Brake Ar

32***78	Wheel Group	2
32***28	Wheel & Brake Ar	1
34***50	Brake Group-Hydraulic Caliper Service	1

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320-4378 Wheel Gp

12***02	Seal-O-Ring	1
14***09	Plug As-Sto	1
16***19	Plug As	1
18***75	Bolt-Socket Head; (3/4-10 Thd)	16

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Service Equipment And Supplies

335-1805 Film Gp

33***92	Film-Identification; (Caterpillar)	1
33***93	Film-Identification; (Cat)	1
33***96	Film-Identification; (Cat Ts220, Lh)	1
33***00	Film-Identification; (Cat Ts220, Rh)	1

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320-3863 Plate & Film Gp -Trailing

19***86	Film; (Safety) (To Right And Left Of Fuel Tank)	2
19***74	Film-Stripe; (Yellow, Reflective)(Fender)	6
22***54	Film-Warning; (Universal, Read Omm, Intl)	1
25***56	Film-Instruction; (Lift Eye Location)	4

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331-5255 Plate & Film Gp -Trailing

19***86	Film; (Safety) (To Right And Left Of Fuel Tank)	2
19***74	Film-Stripe; (Yellow, Reflective)(Fender)	6
22***05	Film; (Warning) (Universal) (On Lh Post Inside Cab)	1
25***56	Film-Instruction; (Lift Eye Location)	4

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331-5254 Plate & Film Gp -Lead

19***86	Film; (Safety) (To Right And Left Of Fuel Tank)	2
19***74	Film-Stripe; (Yellow, Reflective)(Fender)	6
22***05	Film; (Warning) (Universal) (On Lh Post Inside Cab)	1
25***56	Film-Instruction; (Lift Eye Location)	4

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320-3862 Plate & Film Gp -Lead

19***86	Film; (Safety) (To Right And Left Of Fuel Tank)	2
19***74	Film-Stripe; (Yellow, Reflective)(Fender)	6
22***54	Film-Warning; (Universal, Read Omm, Intl)	1
25***56	Film-Instruction; (Lift Eye Location)	4

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Work Tools

331-2662 Edge Gp-Bit & Cutting

1J***07	Bolt 6.99cm (2.75 In.) Long	28
2J***07	Nut-Full; (1-8 X38.1 Thd)	28
33***62	Edge Group-Bit & Cutting	1
4J***65	Bit (Routing)	2

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TS220 serial number reference

The PIN plate is riveted to the scraper frame near the drawbar/hitch area, the same general placement used on other Cat towed implements. Read the first 3 characters as the model/generation prefix (E1L for TS220) and the digits after as the unit sequence number; there is no engine serial to cross-check since the TS220 has no engine of its own.

Prefix	Identifies	Notes
E1L	TS220 towed scraper, two-wheel configuration, introduced 2009	Passive towed implement, no onboard engine; pulled by a Cat track-type tractor or a Challenger Special Application tractor (robust hitches offered for Challenger MTS800/MTS900 series). Confirmed as the TS220-specific prefix by a dedicated TS220 E1L service manual listing, and it appears alongside sibling prefixes (E1J, E1K, E1N, E1R, E1S, E1T, E1W) in a combined TS180/TS185/TS220/TS225 operators manual. Do not apply E1J/E1K (TS180), E1R/E1S (TS185), or E1W (TS225) to TS220 units; E1N and E1T remain unassigned to any confirmed sibling and should not be applied to TS220 either.

Frequently asked questions

What engine does the Cat TS220 use?

None. The TS220 is a towed implement with no onboard engine, transmission, or fuel system. It runs off the towing tractor: a Cat D8-class track-type tractor for single hookup, a D10-class tractor for tandem hookup, or a Challenger MTS800/900-series tractor, delivering roughly 298 to 373 kW (400 to 500 hp) single or 373 to 447 kW (500 to 600 hp) tandem.

What is the operating weight of the Cat TS220?

Empty weight is 13,145 kg (28,980 lb) and rated payload is 25,580 kg (56,400 lb), for a loaded weight around 38,700 kg (85,300 lb) combined. Exact figures vary by hitch configuration (single versus tandem) and attached accessories.

What replaced the Cat TS220?

Nothing has directly replaced it. Caterpillar added the TS220 to its lineup in 2009 after acquiring E-Ject Systems' pull-scraper line in 2008, and it continues to sit alongside the TS180, TS185, and TS225 as part of Cat's current towed-scraper offering rather than being superseded by a newer model.

What TS220 owners discuss

What's the weak point on the TS220's hitch connection, and how is it built to resist wear?

The hitch pin itself is oversized, roughly 89 mm (3.5 in), and bolted down through eight retaining bolts rather than left to float, which cuts down on the pin-to-yoke slop that plagued older pull-scraper hitches. Side-to-side alignment is taken up by UHMW plastic guide blocks instead of steel-on-steel contact, so those guides wear first and the pin stays tight much longer. On a used unit, check the guide blocks for chipping or flat spots and confirm none of the retaining bolts have backed off — a loose hitch pin under load is a towing-safety issue, so have your dealer verify pin fit and bolt torque before pulling a loaded bowl.

How does the apron/ejector hydraulic circuit behave, and what commonly goes wrong with it?

On this scraper the apron and ejector are plumbed in series on the tilt circuit, with a sequence valve that won't let the ejector stroke forward until the apron is fully up — that interlock exists to keep the ejector from ramming a closed apron. Bowl lift runs as its own separate circuit off the same supply. Slow or drifting apron/ejector movement is usually cylinder seal wear or a marginal hydraulic supply from the towing tractor, not a fault in the scraper's own plumbing since it has none of its own pump or valve bank. Any cylinder that creeps down under load with the tractor's hydraulics shut off should be checked for internal bypass before the machine goes back to work.

What causes most hydraulic line failures on a towed scraper like the TS220?

Owners and mechanics consistently point to twisting and chafing where the hoses cross the hitch and flex through the pivot, not simple age, as the main cause of blown lines. Lines rubbing against the frame rail or bowl edge during turns wear through the outer cover over time and eventually let go under pressure. Routing that keeps hose slack away from pinch points and periodic inspection at the hitch crossover catches most of this before it becomes a failure. Quick-couplers at the tractor interface are also a common leak point — check them for scoring or a worn locking collar whenever hoses are disconnected.

What's normal for wheel hub oil and seals on this scraper, and what should be checked?

The wheel hubs run oil-filled and sealed with duo-cone type face seals, carried in heavy-duty five-piece rims. Oil level and clarity are the main service checks — milky or metallic-looking oil points to a failed seal letting water or fines into the hub, and low or missing oil quickly wears the bearings that seal is protecting. Because these hubs see abrasive jobsite conditions and top-loading spillage, seal life varies a lot by job and isn't something a single spec number can predict; check oil condition at every service interval rather than relying on a fixed replacement schedule.

What should I know about the dry-disc brakes before towing or servicing this scraper?

Cat's towed-scraper line, including the TS220, comes standard with dry-disc brakes rather than the wet multi-disc brakes used on self-propelled scrapers. Because they're dry, they're more sensitive to contamination from dust and jobsite debris than an oil-cooled brake, and pad/disc wear should be checked visually rather than assumed from hours alone. Tandem setups run the brake and hydraulic lines for the trailing scraper as steel lines routed inside the bowl walls, which protects them from load-and-carryback damage during top loading but makes a hidden line failure harder to spot on a walkaround. Brake function is safety-critical for road transport and tandem towing — have your dealer verify brake balance and line integrity before moving a loaded train.

Why does the cutting edge and bowl floor wear the way it does, and what's normal?

The bowl floor, walls, apron and ejector are all built from abrasion-resistant steel in a box-section design specifically because top-loading and push-loading concentrate wear differently across the bowl — the floor and cutting edge take the brunt of abrasive contact while the walls mostly just contain material. Cutting-edge wear tends to run faster in the center where most of the cutting load passes and can be uneven if the machine has been run with an unbalanced load or badly matched tractor. Edge wear rate depends heavily on soil type and job mix, so there's no single hour or yardage figure that applies across configurations — inspect edge thickness directly rather than going by calendar time.

What should I check before buying a used TS220?

Beyond the usual used-equipment basics — service records, an independent pre-purchase inspection, and asking the seller directly about any known issues — a few things are specific to this scraper. Check the hitch pin and UHMW guide blocks for play, since a sloppy hitch is expensive to correct and dangerous to tow with. Cycle the apron and ejector under load (borrowed hydraulic power if needed) and watch for drift, which points to cylinder seal wear. Check wheel hub oil for contamination and correct level, and inspect the dry-disc brake pads and any steel brake/hydraulic lines run through the bowl walls if it's a tandem-hookup unit, since those lines are hard to inspect once buried in the structure. Finally check cutting-edge and bowl floor wear against the abrasion-resistant steel's original thickness, since that wear is job-dependent and won't show up on an hour meter. For anything touching brakes or the hitch connection, have your dealer verify before putting the machine to work.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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