Caterpillar TS185
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar TS185 is a pull-type wheel tractor-scraper, not a self-propelled machine. It has no onboard engine, ECM, or hydraulic pump of its own; the bowl, apron, ejector, and lift cylinders are powered entirely by the towing tractor's hydraulics through quick-disconnect couplers. It is matched to large Cat track-type tractors (D8/D9-class) or Challenger and other high-horsepower agricultural tractors in roughly the 298 to 447 kW (400 to 600 hp) range. The TS185 uses a four-wheel walking-beam axle arrangement with dry-disc brakes and radial tires, giving heaped bowl capacity of about 14.5 m3 (19 yd3) and rated load of about 21,050 kg (46,400 lb). Caterpillar brought the design into its lineup in 2009 through the acquisition of E-Ject Systems, and the TS185 has been offered since in two roles: a lead unit (E1R prefix) with a countersunk hitch for solo push-loading, and a trailing unit (E1S prefix) built to pair behind a lead scraper for tandem loading. It shares its platform family with the TS180, TS220, and TS225, and there is no separate predecessor or successor model in Caterpillar's own scraper line.
The TS180/TS185/TS220/TS225 lineup was introduced together and has not been through a generational redesign since; differences across the four models are by wheel count and capacity tier rather than by model year. The two-wheel TS180 and four-wheel TS185 share the same smaller capacity class, while the two-wheel TS220 and four-wheel TS225 share the larger class; the walking-beam suspension and dual rear cylinders that let the operator fine-tune the cutting edge's angle are what set the TS185 apart from the two-wheel TS180 in that same size tier. Because it carries no engine or powertrain, the TS185 stays in service and in the used market largely on the condition of its wear parts: cutting edge and end bits, bowl and ejector steel, walking-beam bushings and pins, hub bearings, and the hitch pin and plate. That makes it a low-complexity, low-cost way to add heavy dirt-moving capacity to a yard that already runs a big track-type or ag tractor, which keeps demand steady for both complete units and structural/wear-part support in mining, land development, and land-forming work.
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 TS185 specifications
Engine
| Onboard engine | None. The TS185 is a towed (non-self-propelled) scraper with no onboard engine, ECM, fuel system, or cooling system. It has no drivetrain of its own; the bowl, apron, and ejector hydraulics run off the pulling tractor's hydraulic system through quick-connect hose couplings. |
| Recommended pulling tractor - single scraper | Track-type tractor in the D8 class, or a rubber-tracked or rubber-tired agricultural tractor rated 298 to 373 kW (400 to 500 hp). |
| Recommended pulling tractor - tandem scrapers (lead + trail) | Track-type tractor in the D9 class, or a rubber-tracked or rubber-tired agricultural tractor rated 373 to 447 kW (500 to 600 hp). |
| Hydraulic services required from pulling tractor | 3 services for a single scraper, 6 services for a lead-and-trail tandem pair. |
Weights
| Empty (shipping) weight | 11 748 kg (25,900 lb) |
| Rated load | 21 050 kg (46,400 lb) |
| Approximate loaded weight (empty + rated load) | About 32 800 kg (72,320 lb) |
| Weight distribution, empty | 28% on the hitch/tongue, 72% on the axle |
| Weight distribution, loaded | 29% on the hitch/tongue, 71% on the axle |
| Ground pressure | Not published in factory literature |
Dimensions
| Overall transport length (max) | 9119 mm (359 in / about 29 ft 11 in) |
| Transport width, outside bowl (max) | 3988 mm (157 in) |
| Width, outside rear tires | 3835 mm (151 in) |
| Width, inside of bowl | 3632 mm (143 in) |
| Width of cut, to router bits | 3785 mm (12 ft 5 in) |
| Overall shipping height | 2515 mm (99 in / about 8 ft 3 in) |
| Height, floor to top of ejector | 1930 mm (76 in) |
| Sidewall height | 1219 mm (48 in) |
| Height, ground to cutting edge (max) | 687 mm (27 in) |
| Bowl floor length | 1219 mm (48 in) |
| Ground clearance (max) | 597 mm (23.5 in) |
| Hitch pin diameter | 89 mm (3.5 in), retained by eight bolts |
Performance
| Depth of cut (max) | 305 mm (12 in) |
| Depth of spread (max) | 711 mm (28 in) |
| Apron opening | 1600 mm (63 in) |
| Cutting edge thickness | 22 mm (0.87 in), reversible 180 degrees to double edge life |
| Hitch platform articulation | About plus or minus 45 degrees of roll, plus or minus 90 degrees of yaw (turning), and plus or minus 27 degrees of pitch (uphill/downhill) |
| Turning radius | 90-degree turn supported via an integrated stop block that prevents tongue-to-tractor contact |
| Front bowl cylinder | 127 mm (5 in) bore, 508 mm (20 in) stroke |
| Rear bowl (adjustable cutting-angle) cylinder | 127 mm (5 in) bore, 203 mm (8 in) stroke |
| Apron cylinder | 102 mm (4 in) bore, 965 mm (38 in) stroke |
| Ejector cylinder | 127 mm (5 in) bore, 914 mm (36 in) stroke |
| Tires | Four radial tires standard, size 23.5R25; optional 26.5R25 on heavy-duty five-piece rims |
| Brakes | Hydraulically actuated dry-disc brakes, two calipers per side on lead and on trail units (same caliper design as the Cat D400E articulated truck) |
| Travel speed / gradeability | Not published for the scraper itself; travel speed and drawbar performance are functions of the pulling tractor, not the towed scraper |
Service capacities (summary)
| Fuel tank | Not applicable - no onboard engine or fuel system |
| Engine oil | Not applicable - no onboard engine |
| Cooling system | Not applicable - no onboard engine or cooling system |
| Hydraulic system | No dedicated onboard reservoir; bowl, apron, and ejector cylinders are supplied by the pulling tractor's hydraulic system through hose couplings (poppet-style or optional threaded flat-face connectors) |
| Wheel hubs | Oil-filled and sealed with Cat Duo-Cone seals; fill capacity not published |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
TS185 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not applicable | TS185 has no onboard engine. It is a towed scraper pan pulled by a separate Cat track-type tractor or Challenger tractor; no engine fluid service applies to the scraper unit itself. |
| Cooling system | Not applicable | No onboard engine or radiator on the scraper. Coolant service belongs to the towing tractor, not the TS185 pan. |
| Fuel tank | Not applicable | No onboard fuel system. The scraper carries no engine and no fuel tank. |
| Transmission / powertrain compartment | Not applicable | No onboard drivetrain or powershift compartment. The scraper is ground-driven and towed; propulsion and gearing belong entirely to the towing tractor. |
| Final drives / differentials | Not applicable | No final drive or differential assemblies on the scraper pan. Wheels are carried on a walking-beam axle with hub bearings only, not a powered drive axle. |
| Hydraulic system (bowl lift, apron, ejector, and brake actuation circuits) | No onboard reservoir — capacity not published for this implement | The TS185 carries no hydraulic tank or pump of its own. Bowl, apron, ejector, and brake actuation draw hydraulic power from the towing tractor through threaded flat-face quick-disconnect couplers and abrasion-resistant hose runs routed inside the bowl walls. Fluid type and viscosity-by-climate grade follow the towing tractor's own OMM recommendation, not a separate TS185 spec. |
| Wheel hubs / bearings (four-wheel walking-beam suspension) | Not published in available specification sheets | Hub bearings are serviced on a scheduled interval; exact fill volume per hub is not listed in publicly available spec sheets. Verify grease or gear-lube grade against the TS185 OMM lubrication chart or with a Cat dealer. |
| Grease points (chassis pivots, hitch/drawbar, walking-beam axle, cutting-edge and apron linkage) | Grease-fitting service — no reservoir volume specified | Serviced with Cat's standard multipurpose extreme-pressure grease line. Cat Advanced 3Moly Grease covers moderate speed, load, and temperature service from -20 to 40 C (-4 to 104 F). Cat Ultra 5 Moly Grease is the step-up choice for heavier load or higher-temperature duty points. Confirm the exact grade called out against the TS185 OMM lubrication chart, since public spec sheets do not publish a model-specific grease grade. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar TS185 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the TS185 beyond the schedule
Predictive Maintenance & Fluid Analysis
The TS185 carries no engine or hydraulic reservoir of its own, so there is no onboard oil sample to pull; fluid condition tracks back to the pull tractor's hydraulic system feeding the bowl, apron, and ejector circuits. On the scraper itself, predictive work means trending wear: measure edge wear rate against soil abrasiveness to forecast edge and end-bit changeouts, check walking-beam bushing and pivot-pin play at set intervals, and monitor hub bearing temperature and grease condition after hard shifts to catch a failing bearing before it scores an axle.
Corrective & Common Repairs
Most corrective work on the TS185 is wear-part replacement rather than component failure. Cutting edges can be rotated 180 degrees to double service life before swapping; end bits, the UHMW ejector alignment guides, and the ejector wear strip and support rollers wear steadily under abrasive material and get replaced on condition. Walking-beam bushings and pins, dry-disc brake pads, and the bolt-on hitch pin and plate are the other recurring repairs, along with hose replacement where lines run near the bowl edge and take abrasion damage.
Overhaul & Rebuild Points
A full rebuild on the TS185 centers on the structure and the walking-beam suspension, not an engine. Expect to reskin worn bowl floor, wall, or ejector steel at the highest-abrasion points, rebuild the walking-beam pivots and bushings as a set, and reseal the lift, apron, and ejector cylinders supplied by the pull tractor's hydraulics. The hitch assembly, including the 89 mm (3.5 in) bolt-on pin and plate, and the wheel hubs and bearings are the other major wear-driven overhaul items on this platform.
Seasonal & Environment Servicing
With no engine, the TS185 needs no coolant or fuel-system winterizing; seasonal care is about the chassis and wear surfaces. Switch to a cold-weather grease for walking-beam, hitch, and cylinder pivot points before winter, protect exposed cylinder rods from corrosion during storage layup, and block up the bowl to take load off the suspension when parked long-term. In dry, abrasive ground conditions, check the ejector rollers, wear strip, and UHMW guides more often, since dust and grit accelerate wear on those sliding surfaces.
TS185 attachments & work tools
Cutting edges and router bits
Bolt-on router bits across the full width of cut come in standard, heavy-duty (extra wear material), and level-cut versions; level-cut bits sit lower than the bolt holes for finish/clean-up passes that keep more material ahead of the edge. Width of cut for the four-wheel TS185 bowl runs around 3.8 m (12 ft 5 in), though this varies by hitch/tandem configuration.
Hitch and drawbar coupling
A bolt-on hitch platform sits between the pulling tractor and the scraper tongue, retained by a heavy 89 mm (3.5 in) hitch pin held with eight bolts. Two pins allow roughly plus/minus 45 degrees of side-to-side oscillation, plus/minus 90 degrees of yaw (turning), and plus/minus 27 degrees of pitch, with a stop block limiting turn radius so the tongue cannot contact the tractor's tires or tracks.
Pulling-tractor compatibility
TS185 is a towed (non-self-propelled) scraper matched to larger Cat track-type tractors and Challenger Special Application wheel/rubber-track tractors; other high-horsepower agricultural wheel or rubber-track tractors can also pull it, per Cat literature.
Tandem lead/trailing configuration
TS185 units can be run in pairs using lead and trailing hitch setups. Both positions share a heavy-duty truss and push block for intermittent push-loading between units, and the lead unit's hitch is countersunk so it can still be push-loaded when working alone.
Rear lift cylinders / cutting-edge angle adjustment
Four-wheel models (TS185 and TS225) add a second pair of lift cylinders at the rear of the bowl, letting an operator fine-tune cutting depth and vary the edge angle for different soil conditions; two-wheel siblings (TS180/TS220) do not have this feature.
Center-lift bowl hydraulics
Ejector, apron, and front/rear bowl lift cylinders are grouped in a center-lift arrangement between the tongue and spreader tube, removing the need for external draft arms and saving weight versus older scraper designs.
Hydraulic line routing and guarding
Cat's towed-scraper line describes use of reinforced hydraulic hose and O-ring face-seal fittings to cut leak points, with rear hydraulic circuits run as steel lines inside the bowl walls so no hose is exposed within the bowl itself.
Suspension and running gear
TS185 uses a four-wheel pan with independent walking-beam axles for a smoother ride, less side sway, and easier finish grading versus the two-wheel TS180/TS220; dry-disc brakes are standard across the towed-scraper line.
Pre-ripping (separate machine, not scraper-mounted)
Hard material ahead of a scraper pass is typically pre-ripped by a separate ripper-equipped tractor rather than any tool mounted on the TS185 itself; ripper shank configuration is chosen per job and dealer, and is not part of the scraper's own work-tool lineup.
All TS185 assemblies by section
Every catalogued assembly group for the Caterpillar TS185. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Braking System
331-2681 Brake Gp-Hyd Caliper Service
| 15***36 | Brake Group-Service | 2 |
| 33***81 | Brake Group-Hydraulic Caliper Service | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 2 |
334-2689 Brake Gp-Hyd Caliper Service
| 14***46 | Kit-Seal | 1 |
| 14***48 | Cover | 1 |
| 14***58 | Seal | 3 |
157-8236 Brake Gp-Service
| 10***06 | Hose As | 1 |
| 13***33 | Hose As | 2 |
| 14***36 | Adapter; (Straight) (-6 Orb X -6 Orfs) | 2 |
331-2659 Lines Gp-Brake -Lead
| 10***06 | Hose As | 1 |
| 13***16 | Hose As | 1 |
| 14***67 | Elbow Group; (Each Includes) | 3 |
341-3272 Lines Gp-Brake -Trailing
| 33***52 | Lines Group-Ejector; -Lead | 1 |
| 33***53 | Lines Group-Apron; -Lead | 1 |
| 33***54 | Lines Group-Hydraulic; -Lead | 1 |
Frame And Body
331-2627 Axle Gp-Oscillating
| 33***27 | Axle Group-Oscillating | 1 |
| 33***28 | Housing As-Oscillating Axle; -Rh | 1 |
| 33***29 | Housing As-Oscillating Axle; -Lh | 1 |
331-2706 Block Gp-Push -Trailing
| 32***90 | Block As-Push | 1 |
| 32***72 | Cap | 4 |
| 33***96 | Pin | 2 |
331-2695 Block Gp-Push -Lead
| 32***65 | Block As-Push | 1 |
| 32***09 | Clamp | 1 |
| 32***16 | Support Group-Lines | 1 |
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 |
320-4531 Hitch Gp-Towing
| 32***31 | Hitch Group-Towing | 1 |
| 32***92 | Pin | 1 |
| 33***33 | Clamp | 1 |
331-2717 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 |
341-3271 Hitch Gp-Towing
| 32***32 | Drawbar As | 1 |
| 32***58 | Plate As | 1 |
| 32***92 | Pin | 1 |
330-8539 Hitch Gp-Towing -Lead
| 03***82 | Bolt-12 Point Head; (5/8-11x2.5-In) | 8 |
| 18***00 | Canister-Storage | 1 |
| 32***30 | Tongue As | 1 |
331-2629 Housing As-Oscillating Axle -Lh
| 09***45 | Seal | 2 |
| 33***40 | Shaft-Axle | 1 |
| 33***42 | Cover | 1 |
331-2628 Housing As-Oscillating Axle -Rh
| 09***45 | Seal | 2 |
| 33***40 | Shaft-Axle | 1 |
| 33***42 | Cover | 1 |
331-2658 Lines Gp-Lubrication -Lead
| 16***97 | Connector As | 4 |
| 33***58 | Lines Group-Lubrication; -Lead | 1 |
| 33***47 | Hose As | 2 |
320-4416 Support Gp-Lines
| 32***16 | Support Group-Lines | 1 |
| 34***77 | Mount As | 1 |
| 34***78 | Arm As | 1 |
341-3288 Support Gp-Lines
| 34***77 | Mount As | 1 |
| 34***87 | Washer-Thrust | 1 |
| 34***88 | Support Group-Lines | 1 |
345-0461 Support Gp-Lines
| 15***36 | Brake Group-Service | 4 |
| 34***61 | Support Group-Lines | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 4 |
Hydraulic System
320-4548 Control Ar-Hydraulic -Trailing
| 2D***48 | Ring-Retaining | 2 |
| 32***48 | Control Ar-Hydraulic; -Trailing | 1 |
| 33***98 | Pin | 1 |
320-4542 Control Ar-Hydraulic -Lead
| 32***42 | Control Ar-Hydraulic; -Lead | 1 |
| 33***56 | Cylinder Group-Apron | 1 |
| 33***58 | Lines Group-Lubrication; -Lead | 1 |
331-2712 Cylinder & Mtg Gp-Ejector
| 2H***06 | Setscrew-Socket; (1/2-13x1-In) | 2 |
| 32***27 | Plate | 6 |
| 32***95 | Pin | 2 |
331-2656 Cylinder Gp-Apron
| 32***27 | Plate | 8 |
| 33***56 | Cylinder Group-Apron | 1 |
| 33***33 | Washer; (60.33x101.6x6.35-mm Thk) | 4 |
331-2715 Cylinder Gp-Bowl
| 32***27 | Plate | 4 |
| 32***98 | Pin | 4 |
| 33***38 | Washer; (60.33x101.6x4.76-mm Thk) | 8 |
334-2714 Cylinder Gp-Bowl
| 14***27 | Connector Group | 12 |
| 15***71 | Cap-Dust | 12 |
| 33***44 | Coupler | 12 |
338-5682 Fitting Gp-Quick Disconnect -Trailing
| 14***15 | Connector As | 4 |
| 14***60 | Elbow Group | 4 |
| 14***76 | Elbow As | 2 |
338-5014 Fitting Gp-Quick Disconnect -Trailing
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 33***45 | Connector | 1 |
| 33***92 | Coupler-Quick | 6 |
338-5020 Fitting Gp-Quick Disconnect -Trailing
| 15***28 | Plug-Dust | 6 |
| 23***83 | Connector | 1 |
| 23***84 | Connector As | 6 |
338-5013 Fitting Gp-Quick Disconnect -Lead
| 14***27 | Connector Group | 6 |
| 15***71 | Cap-Dust | 6 |
| 33***44 | Coupler | 6 |
338-5208 Fitting Gp-Quick Disconnect -Lead
| 14***27 | Connector Group | 6 |
| 33***95 | Connector-Quick | 6 |
| 33***98 | Coupler-Quick | 1 |
338-5021 Fitting Gp-Quick Disconnect -Lead
| 14***27 | Connector Group | 12 |
| 33***95 | Connector-Quick | 12 |
| 33***98 | Coupler-Quick | 1 |
338-5209 Fitting Gp-Quick Disconnect -Trailing
| 23***83 | Connector | 1 |
| 23***84 | Connector As | 6 |
| 33***96 | Coupler-Quick | 1 |
338-5015 Fitting Gp-Quick Disconnect -Lead
| 14***27 | Connector Group | 12 |
| 15***27 | Cap-Dust | 12 |
| 15***90 | Fitting As | 12 |
338-5019 Fitting Gp-Quick Disconnect -Lead
| 14***27 | Connector Group | 6 |
| 15***27 | Cap-Dust | 6 |
| 15***90 | Fitting As | 6 |
338-5210 Fitting Gp-Quick Disconnect -Lead
| 33***97 | Connector-Quick | 12 |
| 33***98 | Cap-Dust | 12 |
| 33***10 | Fitting Group-Quick Disconnect; -Lead | 1 |
338-5681 Fitting Gp-Quick Disconnect -Lead
| 33***97 | Connector-Quick | 6 |
| 33***98 | Cap-Dust | 6 |
| 33***81 | Fitting Group-Quick Disconnect; -Lead | 1 |
334-2691 Lines Gp-Apron -Trailing
| 11***53 | Hose As | 2 |
| 14***27 | Connector Group | 4 |
| 14***47 | Elbow; (-12 Orb/Orfs) | 4 |
331-2653 Lines Gp-Apron -Lead
| 14***15 | Connector As | 4 |
| 14***60 | Elbow Group | 4 |
| 14***76 | Elbow As | 2 |
334-2693 Lines Gp-Bowl Cylinder -Trailing
| 14***27 | Connector Group | 3 |
| 14***47 | Elbow; (-12 Orb/Orfs) | 2 |
| 14***60 | Elbow Group | 2 |
334-2684 Lines Gp-Bowl Cylinder -Lead
| 14***15 | Connector As | 4 |
| 14***22 | Adapter; (-10orb/-12orfs) | 2 |
| 15***37 | Elbow As | 2 |
334-2688 Lines Gp-Bowl Cylinder -Lead
| 14***27 | Connector Group | 4 |
| 14***47 | Elbow; (-12 Orb/Orfs) | 4 |
| 14***76 | Elbow As | 2 |
331-2652 Lines Gp-Ejector -Lead
| 14***27 | Connector Group | 2 |
| 14***47 | Elbow; (-12 Orb/Orfs) | 2 |
| 14***60 | Elbow Group | 2 |
334-2690 Lines Gp-Ejector -Trailing
| 33***90 | Lines Group-Ejector; -Trailing | 1 |
| 34***58 | Plate | 1 |
| 34***63 | Clevis | 2 |
331-2654 Lines Gp-Hydraulic -Lead
| 33***54 | Lines Group-Hydraulic; -Lead | 1 |
| 34***58 | Plate | 1 |
| 34***63 | Clevis | 2 |
334-2692 Lines Gp-Hydraulic -Trailing
| 10***10 | Hose Assem. | 1 |
| 14***47 | Elbow; (-12 Orb/Orfs) | 4 |
| 14***55 | Union As | 24 |
334-2685 Lines Gp-Rear Attachment -Lead
| 16***19 | Plug As | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 33***85 | Lines Group-Rear Attachment; -Lead | 1 |
341-3267 Manifold Gp-Hydraulic -Lh, Lead
| 32***14 | Apron As | 1 |
| 34***59 | Trunnion | 2 |
| 34***67 | Manifold Group-Hydraulic; -Lh, Lead | 1 |
337-8286 Manifold Gp-Hydraulic -Rh, Lead
| 16***19 | Plug As | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 33***86 | Manifold Group-Hydraulic; -Rh, Lead | 1 |
337-8282 Manifold Gp-Hydraulic -Lh, Trailing
| 14***09 | Plug As-Sto | 2 |
| 16***19 | Plug As | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
337-8283 Manifold Gp-Hydraulic -Rh, Trailing
| 16***19 | Plug As | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 33***83 | Manifold Group-Hydraulic; -Rh, Trailing | 1 |
Implements
331-2647 Apron Gp
| 32***93 | Plate | 2 |
| 32***95 | Plate | 1 |
| 32***07 | Bowl As | 1 |
331-2718 Bowl Gp-Scraper -Trailing
| 32***34 | Ejector As | 1 |
| 33***18 | Bowl Group-Scraper; -Trailing | 1 |
| 33***42 | Block | 1 |
331-2711 Bowl Gp-Scraper -Lead
| 32***93 | Plate | 2 |
| 32***95 | Plate | 1 |
| 32***25 | Guard-Hood | 1 |
331-2710 Ejector Gp
| 32***30 | Frame As-Lift | 1 |
| 32***72 | Cap | 2 |
| 33***97 | Pin | 1 |
331-2708 Link Gp-Stabilizer -Lead
| 32***94 | Roller Group-Ejector Carrier | 2 |
| 33***08 | Link Group-Stabilizer; -Lead | 1 |
| 6V***82 | Nut-Full (3/4-10 Thd) | 2 |
331-2707 Link Gp-Stabilizer -Trailing
| 32***09 | Frame As-Lift | 1 |
| 32***72 | Cap | 2 |
| 33***97 | Pin | 1 |
334-2732 Roller & Mtg Gp-Ejctr Carrier
| 19***12 | Seal-O-Ring | 1 |
| 22***76 | Housing-Bearing | 1 |
| 22***78 | Wheel | 1 |
320-4394 Roller Gp-Ejector Carrier
| 1J***07 | Bolt 6.99cm (2.75 In.) Long | 15 |
| 2J***06 | Nut Front Support To Frame; Nut-Front Support To Frame | 14 |
| 2J***07 | Nut-Full; (1-8 X38.1 Thd) | 15 |
Machine Arrangement
320-3872 General Ar-Scraper -Trailing
| 32***72 | General Ar-Scraper; -Trailing | 1 |
| 32***80 | Scraper Ar; -Trailing | 1 |
| 32***41 | Wheel & Brake Ar; -Trailing | 1 |
320-3871 General Ar-Scraper -Lead
| 32***71 | General Ar-Scraper; -Lead | 1 |
| 32***79 | Scraper Ar; -Lead | 1 |
| 32***15 | Wheel & Brake Ar; -Lead | 1 |
320-3880 Scraper Ar -Trailing
| 32***80 | Scraper Ar; -Trailing | 1 |
| 33***27 | Axle Group-Oscillating | 1 |
| 33***82 | Support Group-Axle | 1 |
320-3879 Scraper Ar -Lead
| 32***79 | Scraper Ar; -Lead | 1 |
| 33***39 | Hitch Group-Towing; -Lead | 1 |
| 33***27 | Axle Group-Oscillating | 1 |
Power Train
328-7590 Rim Gp-Demountable
| 32***89 | Rim As | 1 |
| 32***90 | Rim Group-Demountable | 1 |
| 4F***25 | Flange | 2 |
340-6273 Rim Gp-Demountable
| 2D***43 | Seal-O-Ring | 1 |
| 2D***07 | Stud | 1 |
| 2D***08 | Grommmet | 1 |
340-6275 Rim Gp-Demountable
| 2D***43 | Seal-O-Ring | 1 |
| 2D***11 | Valve Group-Tire | 1 |
| 32***90 | Rim Group-Demountable | 1 |
328-7588 Rim Gp-Demountable
| 1J***87 | Flange | 2 |
| 32***87 | Rim As | 1 |
| 32***88 | Rim Group-Demountable | 1 |
331-2682 Support Gp-Axle
| 32***32 | Axle As-Rear | 1 |
| 33***72 | Clamp | 4 |
| 33***82 | Support Group-Axle | 1 |
346-6432 Tire & Rim Ar
| 34***73 | Rim Group-Demountable | 4 |
| 34***14 | Mounting Group-Rim | 4 |
| 34***78 | Tire; (23.5-R25) | 4 |
340-6276 Tire & Rim Ar
| 12***83 | Tire; (26.5-R25) | 4 |
| 34***75 | Rim Group-Demountable | 4 |
| 34***76 | Tire & Rim Ar | 1 |
340-6274 Tire & Rim Ar
| 12***25 | Tire; (23.5-R25) | 4 |
| 34***73 | Rim Group-Demountable | 4 |
| 34***74 | Tire & Rim Ar | 1 |
346-6433 Tire & Rim Ar
| 34***75 | Rim Group-Demountable | 4 |
| 34***14 | Mounting Group-Rim | 4 |
| 34***79 | Tire; (26.5-R25) | 4 |
320-4541 Wheel & Brake Ar -Trailing
| 32***41 | Wheel & Brake Ar; -Trailing | 1 |
| 33***49 | Wheel Group; -Rh | 2 |
| 33***50 | Wheel Group; -Lh | 2 |
320-4515 Wheel & Brake Ar -Lead
| 32***15 | Wheel & Brake Ar; -Lead | 1 |
| 33***49 | Wheel Group; -Rh | 2 |
| 33***50 | Wheel Group; -Lh | 2 |
331-2649 Wheel Gp -Rh
| 14***09 | Plug As-Sto | 1 |
| 18***75 | Bolt-Socket Head; (3/4-10 Thd) | 16 |
| 26***77 | Stud-Wheel | 24 |
331-2650 Wheel Gp -Lh
| 14***09 | Plug As-Sto | 1 |
| 18***75 | Bolt-Socket Head; (3/4-10 Thd) | 16 |
| 26***77 | Stud-Wheel | 24 |
Service Equipment And Supplies
335-1807 Film Gp
| 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 |
320-3865 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 |
320-3864 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 |
331-5256 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 |
331-5257 Plate & Film Gp -Trailing
| 33***57 | Plate & Film Group; -Trailing | 1 |
Work Tools
330-8537 Edge Gp-Bit & Cutting
| 33***37 | Edge Group-Bit & Cutting | 1 |
| 33***92 | Film-Identification; (Caterpillar) | 1 |
| 33***94 | Film-Identification; (Cat) | 1 |
TS185 serial number reference
The PIN plate sits on the left side of the scraper gooseneck/drawbar, near where the draft arm pins to the frame. Read the first three characters as the prefix; on this model the prefix alone tells you lead (E1R) vs trailing (E1S), not model year.
| Prefix | Identifies | Notes |
|---|---|---|
| E1R | Lead scraper configuration | E1R1-Up. Lead unit in a tandem pull, fitted with a countersunk hitch on the push block for push-loading when run without a trailing unit. Passive towed implement, no engine of its own. Single generation since Cat brought the former E-Ject Systems towed-scraper line onto the Cat badge. |
| E1S | Trailing scraper configuration | E1S1-Up. Trailing unit in a tandem pull, coupled behind an E1R lead unit; shares the same heavy-duty truss and push-block arrangement, with its push block built for the trailing position. Passive towed implement, no engine of its own. |
Frequently asked questions
What engine does the Caterpillar TS185 have?
None. The TS185 is a towed scraper with no onboard engine or ECM. Its bowl, apron, and ejector cylinders run on hydraulics supplied by the towing tractor through quick-disconnect couplers, typically a Cat track-type tractor in the D8/D9 class or a Challenger or other high-horsepower agricultural tractor in roughly the 298 to 447 kW (400 to 600 hp) range.
What is the operating weight of the TS185?
Empty weight is documented at approximately 11,748 kg (25,900 lb). Rated load capacity is about 21,050 kg (46,400 lb), with a heaped bowl capacity of about 14.5 m3 (19 yd3). Exact figures vary slightly by configuration (lead E1R versus trailing E1S) and equipped options, so confirm against the plate for your specific unit.
What replaced the Caterpillar TS185?
Nothing has replaced it. The TS185 is part of Caterpillar's still-current towed-scraper lineup, alongside the TS180, TS220, and TS225, introduced together in 2009. These are sibling models differentiated by wheel count and capacity tier, not a generational succession, and no follow-on model has superseded the TS185.
What TS185 owners discuss
What should I expect from the TS185's hydraulics since it has no engine of its own?
What undercarriage wear pattern shows up first on these scrapers?
How fast does the cutting edge wear, and what's the deal with the rear cylinders?
What wears out on the hitch and drawbar connection over time?
How does push-loading work when running scrapers in tandem?
What's the most common hydraulic complaint owners report?
What should I check before buying a used TS185?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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