Caterpillarwork toolwheel saw

Caterpillar SW45

Maintenance schedule, common problems & OEM parts breakdown

The Cat SW45 is a hydraulically driven wheel-saw work tool built for trench and pavement cutting on asphalt, reinforced concrete, and hard or frozen ground, not a self-propelled machine. It cuts to a maximum depth of 450 mm (18 in) and is offered with 80 mm, 160 mm, and 200 mm (3 in, 6 in, 8 in) wheel widths, using a direct-drive hydraulic piston motor to turn the cutting wheel. It carries no engine, ECM, or undercarriage of its own; it mounts to a universal skid-steer quick-attach plate and draws its power entirely from a host carrier's auxiliary hydraulic circuit, typically a skid steer, compact track loader, or compact wheel loader fitted with Cat High-Flow XPS hydraulics delivering roughly 125 L/min at up to about 280 bar, within the tool's stated required-flow range of 90 to 160 L/min. Hydraulic side-shift and depth control are operated from the carrier's cab, and concrete, all-purpose conical, and extreme-life bit options cover different cutting surfaces. The SW45 belongs to Cat's earlier wheel-saw generation, ahead of the current numeric B-Series lineup.

Cat has since moved wheel saws away from the older SW45/SW60-style naming to a numeric B-Series scheme, including SW345B, SW360B, SW380B, SW460B, and SW480B, aligning the naming with depth class rather than a legacy model number. For a fleet running an older skid steer or compact track loader, a used SW45 still delivers the same trenching and pavement-cutting function as the current lineup, and because it is a passive hydraulic tool with no engine or electronics, its service life is governed almost entirely by wheel, bearing, motor, and pin wear rather than obsolescence. That keeps used SW45 units and their wear parts, segments, drive motor seals, mount pins and bushings, in active demand through the Cat dealer parts network for owners rebuilding rather than replacing a working attachment.

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.

SW45 fluids & capacities

System	Capacity	Recommended fluid
Hydraulic system (attachment drive)	No separate reservoir. Wheel saw motor runs off the carrier machine's own hydraulic system; required flow 90 to 160 L/min (24 to 42 gpm) depending on wheel width fitted	Use the hydraulic oil already specified for the host skid steer, track loader, or excavator (Cat HYDO Advanced or equivalent per the carrier's own OMM). The wheel saw itself carries no dedicated hydraulic fluid or tank
Wheel drive / gear case	Not a service-fill compartment. The wheel saw uses a direct-drive hydraulic piston motor with no external gearbox oil reservoir documented for this attachment	Not applicable — sealed drive unit, no owner-serviceable gear oil
Engine crankcase	Not applicable	Not applicable — SW45 is a passive work tool with no onboard engine; power comes entirely from the carrier machine's hydraulics
Cooling system	Not applicable	Not applicable — no engine, no coolant circuit on the attachment
Fuel tank	Not applicable	Not applicable — no fuel system on the attachment
Transmission / powertrain compartment	Not applicable	Not applicable — no transmission; cutting wheel is driven directly by its hydraulic motor
Final drives / axles	Not applicable	Not applicable — no final drives or axles on this work tool
Grease points (pivot pins, depth-control and side-shift linkage, quick-coupler wear surfaces)	Spec only — no fill volume published; grease to purge at each fitting per the lubrication schedule in the tool's OMM	Cat Multipurpose Grease (Cat MPGM/5% Moly type) as used across Cat work-tool attachments. Grease more frequently in wet, muddy, or high-cycle trenching conditions; no separate cold/hot-climate viscosity split is published for this grease type

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

Caterpillar SW45 maintenance schedule

Service interval	Tasks
Every 50 h	Inspect cutting wheel segments and bits for wear, chipping, or missing teeth; replace as needed Check hydraulic hose routing and quick-couplers for leaks, abrasion, or loose fittings Grease side-shift and depth-control pivot points and mount pins per the lubrication chart Clear built-up spoil, mud, and debris from the deflector plates and wheel guard Verify quick-attach wedges and pins are locked and free of excess play against the host carrier
Every 250 h	Inspect the hydraulic drive motor shaft seal and coupling for weep or fluid seepage Check mount pin and bushing bores for elongation or wear and measure clearance Inspect deflector and banking plate hardware and the wheel guard for cracks or bent plates Sample hydraulic fluid at the host machine per Cat S·O·S guidelines to check for contamination from the tool circuit Torque-check wheel hub retaining bolts
Every 500 h	Remove the wheel and inspect hub and spindle bearings for play or roughness Check gearbox or drive-case oil level and condition where equipped; look for metal in the drain sample Inspect hydraulic motor mounting bolts and manifold fittings for torque and leakage Replace worn cutting segments as a set to keep the wheel balanced Inspect quick-coupler faces and O-rings for wear and replace as needed
Every 1,000 h	Overhaul or replace the hydraulic drive motor shaft seals and coupling components Inspect and replace mount pins and bushings if worn beyond tolerance Disassemble and inspect the wheel bearing and hub assembly; repack or replace bearings Check side-shift and depth-control cylinder rod seals for leakage and rebuild if needed Inspect the internal gear drive or chain, where equipped, for wear
Every 2,000 h	Perform a full teardown and inspection of the drive motor, hub, and bearing assemblies Replace all wear bushings, pins, and seals in the mounting frame Inspect the cutting wheel body for bending or cracking and replace if out of tolerance Send the hydraulic drive motor for shop pressure-testing and rebuild if flow or torque has degraded
Every 4,000 h	Inspect the frame and wheel-arm structure for cracking or fatigue at high-stress weld points Rebuild or replace the hydraulic motor assembly Replace the wheel, hub, bearings, and mount hardware as a full overhaul set Repaint and reseal the frame to protect against corrosion before returning the tool to service

Servicing the SW45 beyond the schedule

Predictive Maintenance & Fluid Analysis

Since the SW45 has no engine, health checks route through the host carrier's hydraulic system. Sample return-line fluid from the auxiliary circuit per Cat S·O·S intervals to catch drive-motor wear, metal in the oil, or seal degradation before failure. Watch the carrier's hydraulic temperature and flow gauges while cutting; a drop in cutting rate at rated flow flags a worn piston motor or a slipping direct-drive coupling before the wheel or segments show visible wear.

Corrective & Common Repairs

Most SW45 failures trace to the direct-drive hydraulic piston motor, its shaft seal, or the mount pins linking the tool to the quick-attach plate. Leaking motor seals, elongated pin bores, and deflector plates bent by spoil impact are the recurring field repairs. Replace cutting segments in matched sets to keep the wheel balanced, and re-torque hub bolts after any bit change, since loose hardware is the most common cause of vibration complaints on these wheel saws.

Overhaul & Rebuild Points

A full SW45 rebuild centers on the wheel hub and bearing assembly, the hydraulic drive motor, and the mounting frame's pin bores and bushings. Bearings and shaft seals wear fastest given the shock loading of hard-surface cutting, so rebuild the motor once flow-to-cutting-rate drops rather than waiting on failure. Inspect the wheel body and frame welds for fatigue cracking at high-stress points before returning an overhauled unit to service, since this passive tool has no ECM diagnostics to flag structural wear.

Seasonal & Environment Servicing

Frozen ground and cold-mix asphalt work spike load on the SW45's drive motor and segments, so tighten grease and pin-wear inspections during winter cutting programs. Wet trenching and slurry spoil accelerate corrosion on mount pins, quick-coupler faces, and deflector plate hardware; flush and grease after wet-ground jobs rather than waiting for the scheduled interval. Before freezing storage, drain trapped water from hose ends and coupler bodies to prevent seal damage at the next hookup.

SW45 attachments & work tools

Wheel saw size configurations

The SW45 wheel saw is offered in three cutting-wheel widths: 76 mm, 152 mm and 203 mm (3 in, 6 in and 8 in), all rated to the same maximum depth of cut of 457 mm (18 in). The larger SW60 sibling shares the same family but steps up to a 610 mm (24 in) depth of cut with 152 mm and 203 mm (6 in and 8 in) wheels only.

Coupler / mounting system

Mounts to the carrier through the standard skid-steer universal quick-attach plate, the same interface used across the Cat skid-steer and compact-track-loader work tool line. This tool class does not use a dedicated pin-grabber, pin-lock or wedge coupler.

Hydraulic arrangement

Only offered for carriers built with the High Flow XPS auxiliary hydraulic arrangement; it is not available on standard-flow machines. High Flow XPS delivers roughly 125 L/min (33 gpm) at pressures up to about 280 bar (4,061 psi) to spin the cutting wheel and drive the depth and side-shift functions.

Host machine class

Fitted to Cat skid-steer, multi-terrain and compact-track loaders equipped with the High Flow XPS package, spanning roughly the mid-size to large loader frames in that lineup. Exact model-year and series availability varies by configuration - confirm the carrier is HF XPS-equipped before ordering.

Guarding and operating controls

Comes with standard deflector plates that clear cut debris from the machine's travel path. Hydraulic depth control and hydraulic side-shift let the operator set cut depth and line up the cut without repositioning the carrier.

Typical applications

Built for utility and road trenching, asphalt patch cutting, pavement expansion-joint cuts, and cutting through reinforced concrete, rocky soil or frozen ground where a chain trencher would struggle.

Model-line naming note

Current Cat work-tool catalogs list this size class of wheel saw under SW345/SW345B and SW360/SW360B designations rather than SW45/SW60. Treat the renamed catalog entries as a separate line for spec-verification purposes rather than a drop-in match for the SW45.

All SW45 assemblies by section

Every catalogued assembly group for the Caterpillar SW45. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Frame And Body

230-7025 Deflector Gp-Debris

12***80	Locknut; (M12x1.75-Thd)	6
21***65	Plate As; (Rh)	1
21***66	Plate As; (Lh)	1
21***67	Plate As; (Rh)	1

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219-5464 Deflector Gp-Debris

12***80	Locknut; (M12x1.75-Thd)	6
21***59	Plate As; (Deflector)(Rh)	1
21***60	Plate; (Rh)	1
21***61	Plate; (Lh)	1

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227-7316 Frame Ar-Wheel Saw

22***16	Frame Ar-Wheel Saw	1
22***17	Frame Group-Wheel Saw; -Rear	1
22***19	Frame Group-Wheel Saw; -Center	1
22***37	Frame Group-Wheel Saw; -Front	1

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228-9494 Frame Ar-Wheel Saw

22***17	Frame Group-Wheel Saw; -Rear	1
22***37	Frame Group-Wheel Saw; -Front	1
22***93	Frame Group-Wheel Saw; -Center	1
22***94	Frame Ar-Wheel Saw	1

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219-5453 Frame Ar-Wheel Saw

21***53	Frame Ar-Wheel Saw	1
21***54	Frame Group-Wheel Saw; -Center	1
22***17	Frame Group-Wheel Saw; -Rear	1
22***37	Frame Group-Wheel Saw; -Front	1

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230-7027 Frame Ar-Wheel Saw

22***17	Frame Group-Wheel Saw; -Rear	1
22***62	Frame Group-Wheel Saw; -Front	1
23***27	Frame Ar-Wheel Saw	1
23***28	Frame Group-Wheel Saw; -Center	1

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227-8125 Frame Ar-Wheel Saw

22***17	Frame Group-Wheel Saw; -Rear	1
22***24	Frame Group-Wheel Saw; -Center	1
22***25	Frame Ar-Wheel Saw	1
22***62	Frame Group-Wheel Saw; -Front	1

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227-8155 Frame Gp-Drum & Drive

12***80	Locknut; (M12x1.75-Thd)	6
22***43	Cover	1
22***26	Guide; (Roller)	2
22***27	Pin-Pivot	2

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227-7324 Frame Gp-Drum & Drive

12***80	Locknut; (M12x1.75-Thd)	6
22***43	Cover	1
22***24	Frame Group-Drum & Drive	1
22***25	Frame As; (Center)	1

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230-7029 Frame Gp-Drum & Drive

12***80	Locknut; (M12x1.75-Thd)	6
22***43	Cover	1
22***26	Guide; (Roller)	2
22***27	Pin-Pivot	2

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219-5456 Frame Gp-Drum & Drive

12***80	Locknut; (M12x1.75-Thd)	6
21***56	Frame Group-Drum & Drive	1
21***57	Plate As; (Trench)	1
22***43	Cover	1

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228-6837 Frame Gp-Wheel Saw -Front

22***46	Plate; (Cover)(Cylinder)	1
22***47	Plate-Cover; (Trench Cleaner)	1
22***48	Handle	1
22***49	Plate As; (Front)	1

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227-7319 Frame Gp-Wheel Saw -Center

06***32	Ring-Retaining; (Internal)	1
09***28	Ring-Retaining; (External)	1
1H***27	Seal 10.1 cm(3.984 In.) I.D.	1
22***19	Frame Group-Wheel Saw; -Center	1

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228-9493 Frame Gp-Wheel Saw -Center

06***32	Ring-Retaining; (Internal)	1
09***28	Ring-Retaining; (External)	1
12***80	Locknut; (M12x1.75-Thd)	6
1H***27	Seal 10.1 cm(3.984 In.) I.D.	1

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230-7028 Frame Gp-Wheel Saw -Center

06***32	Ring-Retaining; (Internal)	1
09***28	Ring-Retaining; (External)	1
1H***27	Seal 10.1 cm(3.984 In.) I.D.	1
22***21	Spacer-Bearing; (61x70x6-mm Thk)	1

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227-7317 Frame Gp-Wheel Saw -Rear

21***90	Frame As	1
21***92	Pin	2
22***70	Plate-Guide	4
22***71	Plate-Clamp	2

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227-8124 Frame Gp-Wheel Saw -Center

06***32	Ring-Retaining; (Internal)	1
09***28	Ring-Retaining; (External)	1
1H***27	Seal 10.1 cm(3.984 In.) I.D.	1
22***21	Spacer-Bearing; (61x70x6-mm Thk)	1

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219-5454 Frame Gp-Wheel Saw -Center

06***32	Ring-Retaining; (Internal)	1
09***28	Ring-Retaining; (External)	1
1H***27	Seal 10.1 cm(3.984 In.) I.D.	1
21***49	Drum Group-Wheel Saw	1

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227-8162 Frame Gp-Wheel Saw -Front

21***68	Plate As; (Rh-Deflector)	1
22***48	Handle	1
22***52	Plate-Spacer	2
22***55	Plate-Guide	2

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Hydraulic System

228-9347 Cylinder & Mtg Gp-Wheel Saw -Sideshift

21***91	Locknut	2
22***47	Cylinder & Mtg Group-Wheel Saw; -Sideshift	1
23***51	Cylinder Group-Hydraulic; -Sideshift	1

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227-8175 Cylinder & Mtg Gp-Wheel Saw -Trench Cleaner

21***91	Locknut	1
22***33	Guide	1
22***75	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1
22***76	Cylinder Group-Hydraulic; -Trencher Cleaner	1

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227-8173 Cylinder & Mtg Gp-Wheel Saw -Depth

21***91	Locknut	2
22***73	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***74	Cylinder Group-Hydraulic; -Depth	2

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227-7366 Cylinder & Mtg Gp-Wheel Saw -Depth

21***91	Locknut	2
22***66	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***67	Cylinder Group-Hydraulic; -Depth	2

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227-7369 Cylinder & Mtg Gp-Wheel Saw -Trench Cleaner

21***91	Locknut	1
22***33	Guide	1
22***69	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1
22***70	Cylinder Group-Hydraulic; -Trench Cleaner	1

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227-7370 Cylinder Gp-Hydraulic -Trench Cleaner

22***70	Cylinder Group-Hydraulic; -Trench Cleaner	1
22***71	Kit-Seal	1

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227-7367 Cylinder Gp-Hydraulic -Depth

21***19	Kit-Seal	1
22***67	Cylinder Group-Hydraulic; -Depth	1

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227-8174 Cylinder Gp-Hydraulic -Depth

21***19	Kit-Seal	1
22***74	Cylinder Group-Hydraulic; -Depth	1

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227-8176 Cylinder Gp-Hydraulic -Trencher Cleaner

22***71	Kit-Seal	1
22***76	Cylinder Group-Hydraulic; -Trencher Cleaner	1

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230-6051 Cylinder Gp-Hydraulic -Sideshift

21***31	Kit-Seal	1
23***51	Cylinder Group-Hydraulic; -Sideshift	1

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248-0190 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***66	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***69	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1
22***47	Cylinder & Mtg Group-Wheel Saw; -Sideshift	1

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228-9492 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***66	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***47	Cylinder & Mtg Group-Wheel Saw; -Sideshift	1
22***92	Hydraulic Ar	1

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248-0984 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***73	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***75	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1
22***47	Cylinder & Mtg Group-Wheel Saw; -Sideshift	1

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227-8172 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***72	Hydraulic Ar	1
22***73	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***75	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1

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247-8103 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***66	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***47	Cylinder & Mtg Group-Wheel Saw; -Sideshift	1
22***17	Valve Group-Check	1

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227-7365 Hydraulic Ar

22***35	Manifold Group-Control; -Wheelsaw	1
22***65	Hydraulic Ar	1
22***66	Cylinder & Mtg Group-Wheel Saw; -Depth	1
22***69	Cylinder & Mtg Group-Wheel Saw; -Trench Cleaner	1

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248-0985 Lines Gp-Connecting

14***48	Fitting As; (Quick Disconnect, Male)	1
14***49	Fitting As; (Quick Disconnect, Female)	1
14***18	Connector As	2
14***25	Connector As.	2

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234-5840 Lines Gp-Connecting

14***18	Connector As	2
14***27	Connector Group	4
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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234-5837 Lines Gp-Connecting

14***18	Connector As	2
14***27	Connector Group	4
15***94	Coupler As-Quick Disconnect; (Female)(Quick Disconnect)	1
15***95	Fitting As; (Quick Disconnect, Male)	1

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247-8104 Lines Gp-Connecting

14***48	Fitting As; (Quick Disconnect, Male)	1
14***49	Fitting As; (Quick Disconnect, Female)	1
14***18	Connector As	2
14***25	Connector As.	2

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234-5842 Lines Gp-Cylinder

14***18	Connector As	4
17***67	Clamp	1
23***53	Hose As	1
23***42	Lines Group-Cylinder	1

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234-5839 Lines Gp-Cylinder

14***18	Connector As	2
17***67	Clamp	1
23***53	Hose As	1
23***39	Lines Group-Cylinder	1

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234-7675 Lines Gp-Cylinder

14***18	Connector As	4
17***67	Clamp	1
23***53	Hose As	1
23***72	Hose As	2

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234-5841 Lines Gp-Motor

12***87	Flange-Split	4
14***27	Connector Group	2
1P***02	Seal-Rectangular 28.83mm(1.136in) Id	2
23***41	Lines Group-Motor	1

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234-5838 Lines Gp-Motor

12***87	Flange-Split	4
14***27	Connector Group	2
1P***02	Seal-Rectangular 28.83mm(1.136in) Id	2
23***38	Lines Group-Motor	1

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227-7035 Manifold Gp-Control -Wheelsaw

22***20	Valve As	2
22***35	Manifold Group-Control; -Wheelsaw	1
22***98	Valve Group-Solenoid	2
23***94	Connector	2

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227-9398 Valve Gp-Solenoid

21***13	Seal-O-Ring	1
21***14	Seal-O-Ring	1
21***73	Cartridge As-Valve	1
21***74	Seal & Retainer As	1

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Service Equipment And Supplies

234-6645 Film Gp

15***35	Film-Warning; (Crush Hazard, Stay Back)	2
15***36	Film-Warning; (Read Operation Manual)	1
15***40	Film-Warning; (No Clrn, Flying Obj, Stay Back)	2
21***74	Film-Instruction; (Depth Scale)(Depth Scale)	1

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234-6644 Film Gp

15***35	Film-Warning; (Crush Hazard, Stay Back)	2
15***36	Film-Warning; (Read Operation Manual)	1
15***40	Film-Warning; (No Clrn, Flying Obj, Stay Back)	2
21***58	Film; (Depth Scale)	1

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Work Tool Arrangement

227-7315 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	6
22***14	Harness As-Work Tool; (Power)	1
22***15	Wheel Saw Ar	1
22***16	Frame Ar-Wheel Saw	1

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246-7309 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	13
21***53	Frame Ar-Wheel Saw	1
22***14	Harness As-Work Tool; (Power)	1
23***44	Film Group	1

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246-7312 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	13
22***14	Harness As-Work Tool; (Power)	1
22***25	Frame Ar-Wheel Saw	1
23***45	Film Group	1

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246-7310 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	13
22***14	Harness As-Work Tool; (Power)	1
22***16	Frame Ar-Wheel Saw	1
23***44	Film Group	1

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231-3218 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	6
21***53	Frame Ar-Wheel Saw	1
22***14	Harness As-Work Tool; (Power)	1
22***65	Hydraulic Ar	1

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227-8130 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	6
22***14	Harness As-Work Tool; (Power)	1
22***25	Frame Ar-Wheel Saw	1
22***30	Wheel Saw Ar	1

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231-3219 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	6
22***14	Harness As-Work Tool; (Power)	1
22***72	Hydraulic Ar	1
23***27	Frame Ar-Wheel Saw	1

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246-7308 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	13
22***14	Harness As-Work Tool; (Power)	1
22***94	Frame Ar-Wheel Saw	1
23***44	Film Group	1

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228-9495 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	6
22***14	Harness As-Work Tool; (Power)	1
22***92	Hydraulic Ar	1
22***94	Frame Ar-Wheel Saw	1

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246-7311 Wheel Saw Ar

15***70	Kit-Connecting Plug; (2-Pin)(Engine Sensor Wiring Harness)	13
22***14	Harness As-Work Tool; (Power)	1
23***27	Frame Ar-Wheel Saw	1
23***45	Film Group	1

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Work Tools

227-7338 Drum Gp-Wheel Saw

22***71	Bit As-Cutting; (Standard)	62
22***38	Drum Group-Wheel Saw	1
22***39	Drum As	1
22***40	Bit As-Cutter; (Concrete Applications)	62

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230-7023 Drum Gp-Wheel Saw

22***71	Bit As-Cutting; (Standard)	96
22***40	Bit As-Cutter; (Concrete Applications)	96
23***23	Drum Group-Wheel Saw	1
23***24	Drum As	1

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227-8159 Drum Gp-Wheel Saw

22***71	Bit As-Cutting; (Standard)	96
22***40	Bit As-Cutter; (Concrete Applications)	96
22***59	Drum Group-Wheel Saw	1
22***60	Drum As	1

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219-5449 Drum Gp-Wheel Saw

21***49	Drum Group-Wheel Saw	1
21***51	Drum As	1
22***71	Bit As-Cutting; (Standard)	56
22***40	Bit As-Cutter; (Concrete Applications)	56

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228-9374 Drum Gp-Wheel Saw

22***71	Bit As-Cutting; (Standard)	64
22***08	Holder-Bit	64
22***40	Bit As-Cutter; (Concrete Applications)	64
22***73	Drum As	1

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Frequently asked questions

What engine does the Cat SW45 wheel saw use?

None. The SW45 is a passive hydraulic attachment with no engine or ECM of its own. It draws all cutting power from its host carrier's auxiliary hydraulic circuit, typically a skid steer, compact track loader, or compact wheel loader fitted with Cat High-Flow XPS hydraulics, through a direct-drive hydraulic piston motor that turns the cutting wheel.

What is the operating weight of the Cat SW45 wheel saw?

Cat has not published a dry weight figure for the SW45 attachment. As a work tool rather than a self-propelled machine, its weight is not tracked the way an operating weight spec is for a carrier; confirm the tool's weight against the host machine's rated lift and tool capacity before pairing it on a used unit.

What replaced the Cat SW45 wheel saw?

The SW45 belongs to Cat's earlier wheel-saw naming generation. Current production uses a numeric B-Series lineup, SW345B, SW360B, SW380B, SW460B, and SW480B, covering the same skid-steer and compact-track-loader trenching and pavement-cutting role under updated depth-class model numbers.

What SW45 owners discuss

What hydraulic flow and pressure does the SW45 actually need from the carrier, and what happens if it's run on standard flow?

The SW45 is built around a high-flow auxiliary circuit, roughly 125 L/min (33 gal/min) at pressures up to about 280 bar (4,000 psi). Put it on a standard-flow carrier and the piston motor never sees the flow it needs to bring the wheel up to cutting speed - production drops off fast and the segments start rubbing instead of cutting, which glazes the carbide and speeds up wear. Match the carrier's high-flow spec to the saw before it goes to work, and confirm the host's high-flow selector is actually engaged before starting a cut.

Why does the cutting wheel wear unevenly on some jobs and not others?

Segment wear tracks what's being cut more than hours on the clock - reinforced concrete with sandy aggregate and old asphalt full of gravel eat carbide much faster than clean concrete or frozen ground. Wear that's heavier on one side of the wheel usually means the saw was run out of plumb, leaning into the cut, or depth was pushed too far in one pass and overloaded one edge of the wheel. Keep the attachment square to the surface and let the wheel clear the cut rather than forcing depth.

Does the SW45 have a gearbox or chain drive that needs servicing?

No separate gearbox to worry about - it's direct drive, with the hydraulic motor turning the cutting wheel straight off its shaft rather than through a chain or gear reduction the way an elevator-style chain trencher works. That takes chain wear and gearbox oil changes off the maintenance list, but it puts more weight on the motor shaft seal and coupling, since that's the only wear point left between the hydraulic circuit and the wheel.

What's the deflector and trench-cleaning setup supposed to do, and what happens when it's out of adjustment?

The deflector plates push spoil out of the wheel's path as it cuts, and the wider wheels add a hydraulic trench-cleaning device that sweeps the trench floor behind the cut. A loose or worn deflector lets spoil re-pack into the trench behind the wheel, and operators end up backdragging or hand-cleaning the cut afterward - that's a sign the deflector needs adjustment or a wear plate, not a wheel problem.

The saw feels loose or knocks when it hits something hard - is that the wheel or something else?

Most complaints like this trace back to pin and bushing wear at the quick-attach mounting plate rather than the cutting wheel. Play at the coupler transmits a knock or clunk straight to the cab whenever the wheel hits rebar or a hard inclusion in the material. Check mount pin and bushing clearance before blaming the wheel or motor.

What about the hydraulic case-drain hookup - any known gotchas?

If the motor has a case-drain line, it needs to run straight back to tank rather than being spliced into the pressurized return line or routed through a return filter that adds backpressure. A miss-routed case drain builds heat and pressure at the motor seals, and that shows up as an oil weep or premature seal failure at the wheel motor. Have your dealer verify the case-drain routing on the carrier before putting the saw into regular service.

What should I check before buying a used SW45?

Start with remaining segment or tooth height on the wheel and look for the uneven-wear pattern described above. Check the motor for shaft-seal weeping and confirm it turns freely with no play in the coupling. Inspect the quick-attach mount pins and bushings for play. Look over the deflector plates and, on the wider wheels, the hydraulic trench-cleaning device for cracked or worn wear plates. Cycle the flat-face couplers and hoses and look for swelling, cracking, or weeping at the crimps, and ask for maintenance history that confirms which carrier and flow setting it ran on its whole life.

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

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