Caterpillarwork toolsnow blower

Caterpillar SR17

Maintenance schedule, common problems & OEM parts breakdown

The Cat SR17 is a work tool, not a self-propelled machine: a two-stage snow blower attachment with an auger to break and gather snow and an impeller to throw it clear, hydraulically driven off the host carrier's auxiliary circuit through a chain-and-sprocket drive rather than any engine of its own. It mounts to skid steer loaders, compact track loaders, and compact wheel loaders through a universal quick-coupler, and it carries no ECM, hydraulic reservoir, transmission, or undercarriage of its own; all of that belongs to the carrier machine. It is documented in the same factory service manual family as siblings SR18 and SR21, under serial prefix SBA. No verified production-year range or standalone numeric spec sheet covering width, weight, or hydraulic flow has surfaced for the SR17 specifically.

Within the SBA-prefix family, the SR17, SR18, and SR21 share the same chain-driven, shear-pin-protected design and the same service and parts literature, but differ by auger/impeller size and by the hydraulic flow and coupler frame matched to their intended carrier class, so a part or repair step that fits one size does not automatically fit another. That distinction matters to used-equipment and parts buyers today because the SR17 predates Cat's later direct-drive hydraulic-motor snow blower line, the separately numbered SR117/SR118/SR121/SR318/SR321 family, which did away with the gearbox, chain, sprockets, and shear pins entirely. Confirming the model plate and SBA prefix before ordering chain, sprockets, shear pins, or bearing kits keeps buyers from cross-shopping parts that look similar but belong to an unrelated, newer design.

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 SR17 specifications

Engine

Power sourcePassive hydraulic work tool with no onboard engine. Driven entirely through the carrier machine's auxiliary hydraulic circuit via a skid steer coupler interface.
Emissions tierNot applicable - no engine fitted to the attachment.

Weights

Operating weightNot published in available factory literature for this specific model. Confirm with your dealer before arranging transport.
Shipping weightNot documented.
Ground pressureNot applicable - passive mounted attachment, no independent ground contact rating.

Dimensions

Intake widthNot documented in available factory literature for this specific model.
Overall width / height / lengthNot documented in available factory literature for this specific model.
Auger and impeller diameterNot documented in available factory literature for this specific model.

Performance

Design typeTwo-stage snow blower: an auger feeds cut snow into a rotating impeller that throws it clear of the work area. Chute can be rotated to direct discharge to the front or either side of the carrier machine.
Travel speedNot applicable - the attachment has no independent travel; ground speed is a function of the carrier machine.
Maximum throw distanceNot documented for this specific model in available factory literature.
Required hydraulic flow / pressureNot documented for this specific model. Hydraulic demand depends on carrier machine flow class and is not confirmed for this unit.
GradeabilityNot applicable to this work tool class.

Service capacities (summary)

Fuel tankNot applicable - no engine or fuel system on the attachment.
Hydraulic systemNot applicable - the attachment uses the carrier machine's hydraulic reservoir; it has no dedicated hydraulic tank.
Engine oilNot applicable - no engine.
Cooling systemNot applicable - no engine.

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

SR17 fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)Not applicableSR17 carries no onboard engine. It is a passive, hydraulically driven two-stage snow blower work tool powered entirely by the host carrier's auxiliary hydraulic circuit, so there is no engine oil or filter to service on the attachment itself.
Cooling systemNot applicableNo engine, radiator, or coolant circuit fitted to this attachment. Heat from the drive circuit is handled by the host machine's own hydraulic oil cooler.
Fuel tankNot applicableNo onboard fuel system. The attachment carries no fuel of its own.
Transmission/powertrain compartmentNot applicableThe two-stage auger and impeller are turned by a hydraulic motor through a chain drive, not a self-contained transmission or gearbox with its own oil fill.
Final drives / axles / differentialsNot applicableSR17 is a mounted work tool, not a self-propelled machine. It has no axle, differential, or final drive housings of its own.
Hydraulic system and tankNo dedicated onboard reservoir or fill capacity for the attachment. It draws flow and pressure from the host carrier's own hydraulic system; required flow and pressure windows vary by host machine and configuration and are matched at setup.Use the hydraulic oil grade specified in the host carrier's own operation and maintenance manual — the SR17 OMM does not call out its own hydraulic fluid, since the attachment shares the host's circuit rather than carrying a separate one. Exposed chrome rod surfaces on the attachment's hydraulic cylinders get a coat of Cat rust-preventative oil to guard against corrosion during storage.
Auger and impeller bearings (grease points)Lubricate each auger bearing and both impeller bearings on a 30-service-hour interval. No fill quantity is specified — apply grease until it shows fresh at the fitting.Cat Multipurpose Grease containing three to five percent molybdenum disulfide, meeting MIL-M-7866 Grade 2 (NLGI 2). The OMM does not call out a separate cold-weather viscosity grade for this grease.
Discharge chute and coupler drive chainsApply at each 30-service-hour interval. No volume is specified — the OMM calls for a light, even coat rather than a metered fill.Clean engine oil, applied directly to the chain links. No specific oil brand or viscosity grade is named for this application in the SR17 manual.

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

Caterpillar SR17 maintenance schedule

Service intervalTasks
Every 10 h
  • Inspect the cutting edge and skid shoes for wear, cracking, or loose mounting hardware, and adjust skid shoe height for pavement or gravel work.
  • Check auger and impeller shear pins/bolts for shearing, cracking, or looseness, and replace any sheared pins before operating.
  • Inspect hydraulic hoses, quick-disconnect couplers, and fittings at the work tool for leaks, abrasion, or loose connections.
  • Verify the chute rotation drive and deflector move through their full range without binding.
  • Clear packed snow and ice from the auger housing, impeller housing, and chain guard before and after each shift.
  • Confirm the quick-coupler pins/wedges are fully engaged and the mounting frame shows no cracked welds.
Every 250 h
  • Grease the auger and impeller shaft bearings, chain-drive idler, and pivot points per the OMM lubrication chart.
  • Check drive chain tension and lubricate the chain, adjusting or replacing it if stretch exceeds the OMM limit.
  • Inspect the chain case/gearbox for oil leaks and confirm the lubricant level.
  • Inspect auger flighting, impeller blades, and housing liners for wear or bending.
  • Torque-check mounting frame, coupler, and cutting-edge fasteners.
Every 500 h
  • Drain and refill the chain case/gearbox lubricant to the OMM specification.
  • Inspect shear-pin hubs for elongated bolt holes and rebush as needed.
  • Check auger and impeller bearings for play and replace seals showing grease leakage.
  • Inspect hydraulic motor mounting and chain-drive sprocket alignment, correcting sprocket wear.
  • Inspect the chute rotation chain/gear drive and reset chute stops.
Every 1,000 h
  • Remove and inspect auger and impeller shafts for wear, bending, or fatigue cracking, replacing bushings and seals as a set.
  • Inspect and replace auger and impeller bearings showing wear.
  • Inspect the full drive chain and sprockets, replacing the chain if stretch exceeds the service limit.
  • Check the hydraulic motor coupling and housing for wear, resealing if drive-shaft leakage is present.
  • Recoat exposed housing and frame surfaces showing corrosion.
Every 2,000 h
  • Perform a full teardown of the chain case/gearbox, replacing worn gears, bearings, and seals.
  • Replace or rebuild auger and impeller assemblies once flighting or blades pass the OMM wear limit.
  • Inspect and replace mounting frame pins/bushings and quick-coupler wear plates.
  • Pressure-test hydraulic hoses and the drive motor for internal leakage, replacing hoses showing age-cracking regardless of visible leaks.
  • Rebuild or replace the chute rotation drive assembly.
  • Before storage, flush packed snow, ice-melt residue, and debris from the auger and impeller housings and dry thoroughly.
  • Grease every fitting before storage to purge moisture from bearings.
  • Cap hydraulic quick-disconnects and coat exposed rods and couplers with rust preventative for the off-season.
  • Store the work tool off the ground on blocks or a stand with the coupler frame supported to prevent distortion.
  • Before first use each season, cycle the chute rotation, recheck shear pins, and re-torque fasteners loosened by freeze-thaw cycling.

Servicing the SR17 beyond the schedule

Predictive Maintenance & Fluid Analysis

The SR17 has no engine or reservoir of its own, so predictive care centers on the chain case and grease points. Pull chain-case lubricant samples at scheduled service to catch water intrusion from melting snow and metal fines that flag early bearing or sprocket wear before a failure strands the attachment mid-storm. Track grease consumption at auger and impeller bearings; a sudden increase usually means a worn seal letting slush in. Hydraulic condition monitoring for the drive circuit falls under the host carrier's own oil-sampling program, not the work tool.

Corrective & Common Repairs

Shear pins at the auger hub are the most frequent replacement, built to snap on frozen slush, curb strikes, or buried debris and protect the gearbox. Chain stretch is next: retension or replace the drive chain and sprockets before slack lets the auger lag the impeller. Cutting edges and skid shoes wear from pavement contact and flip or replace on schedule. Leaking shaft seals at the auger or impeller bearings show up as grease weeping past the housing and call for seal and bushing replacement, not just a refill.

Overhaul & Rebuild Points

Major rebuild work centers on the chain case: a full teardown replaces worn gears, sprockets, chain, bearings, and seals. Auger and impeller shafts get pulled and checked for bending or fatigue cracking from packed-ice stalls, with bushings and seals renewed as a set. Flighting and impeller blades worn thin from abrasive sand and salt-treated pavement are replaced or built back up by welding before they lose throw distance. The mounting frame and coupler wear plates get inspected for elongation and rebuilt before play develops at the carrier interface.

Seasonal & Environment Servicing

Road salt and de-icer chemicals are the SR17's biggest enemy between storms. Before each season, flush packed snow and salt residue from the auger and impeller housings, grease every fitting to purge moisture, and cycle the chute rotation drive to confirm it isn't seized from corrosion. Cap hydraulic quick-disconnects when the attachment sits idle to keep road spray and brine out of the coupling faces. For off-season storage, block the frame off the ground, coat exposed metal with rust preventative, and re-torque fasteners loosened by freeze-thaw cycling.

SR17 attachments & work tools

Work tool family & size class

SR17 is a two-stage (auger/impeller) snow blower attachment and the smallest unit documented under the same Cat work tool service manual as SR18, SR21, SR318 and SR321. An exact published intake width for this specific unit was not found and should be confirmed with a dealer.

Coupler / mounting system

Mounts to the host loader with a standard universal quick-coupler plate used across Cat skid steer loaders, compact track loaders, multi-terrain loaders and compact wheel loaders. Hydraulic supply and return connect through flat-face, plug-n-play quick-connect couplers, and no separate electrical harness is needed since the tool has no onboard controller.

Hydraulic kit / flow requirement

Runs on the host machine's auxiliary hydraulic circuit to drive the auger and impeller; it is a fully hydraulic, non-electric work tool. A dedicated SR17 flow/pressure spec sheet was not located; verify actual flow and pressure needs with a dealer before ordering hoses or couplers.

Discharge chute / deflector

Two-stage head throws snow through a chute that rotates for directional control. Chute rotation and deflector angle adjustment can be cab-controlled (hydraulic) or manual depending on the arrangement fitted.

Cutting edge / skid shoe guarding

Shares a reversible, bolt-on cutting edge along the auger housing and adjustable skid shoes that set cutting-edge ride height over pavement or gravel. The auger drivetrain uses a shear-pin protection device, typical of this family, to reduce damage from ice chunks or buried debris.

Machine class compatibility

Sized for the compact loader classes - skid steer loaders, compact track loaders, multi-terrain loaders and compact wheel loaders - matched primarily by hydraulic flow class rather than one fixed host model.

Electrical / control interface

No factory ECM or electrical work-tool recognition package is fitted; control is limited to the host machine's standard auxiliary hydraulic valve and, where equipped, a manual chute-rotation crank. This keeps the tool interchangeable across older and newer host machines without a work-tool controller pairing step.

All SR17 assemblies by section

Every catalogued assembly group for the Caterpillar SR17. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Electrical System
227-5499 Wiring Gp-Work Tool -Electric Power
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
11***99Gasket; (Air Conditioner Control)1
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212-4564 Wiring Gp-Work Tool -Deflector Control
03***49Nut-Self Lock; (No.10.Unc)1
15***53Film-Information; (Read Omm)1
21***64Wiring Group-Work Tool; -Deflector Control1
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263-2115 Wiring Gp-Work Tool
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***06Receptacle Kit; (Includes Wedge And Receptacle Assem.)1
11***99Gasket; (Air Conditioner Control)1
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261-4419 Wiring Gp-Work Tool
10***67Washer-Hard; (7.2x25x2-mm Thk)2
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)3
11***15Relay As; (12-Volt)(Junction Box)2
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Frame And Body
215-1857 Deflector Gp-Snowblower -73-In, 85-In
03***55Locknut; (5/16-18-Thd)(Marked X)6
09***43Pin-Cotter1
13***85Rivet-Pop7
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214-7117 Deflector Gp-Snowblower -67-In
03***55Locknut; (5/16-18-Thd)(Marked X)6
13***85Rivet-Pop7
1D***72Bolt-Carriage; (1/2-13x5.5-In)6
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212-4578 Frame Gp-Snowblower -85-In
1K***72Locknut Horn To Guard13
21***78Frame Group-Snowblower; -85-In1
21***75Frame As1
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212-4566 Frame Gp-Snowblower -67-In
1K***72Locknut Horn To Guard10
21***66Frame Group-Snowblower; -67-In1
21***82Impeller As1
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212-4572 Frame Gp-Snowblower -73-In
1K***72Locknut Horn To Guard12
21***72Frame Group-Snowblower; -73-In1
21***22Support Group-Work Tool2
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213-7222 Support Gp-Work Tool
21***22Support Group-Work Tool1
28***93Tube As1
28***97Pad As; (Stabilizer)1
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Hydraulic System
213-7190 Cylinder Gp-Hydraulic
21***90Cylinder Group-Hydraulic1
21***16Kit-Seal1
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283-9595 Cylinder Gp-Hydraulic
28***95Cylinder Group-Hydraulic1
4K***77Nut-Self Locking1
7J***04Seal-O-Ring (Id=7.65mm)2
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212-4567 Hydraulic Ar-Snowblower -67-In
21***67Hydraulic Ar-Snowblower; -67-In1
21***90Cylinder Group-Hydraulic1
21***62Lines Group-Connecting; -67-Inch1
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212-4579 Hydraulic Ar-Snowblower -85-In
21***76Manifold Group-Control1
21***79Hydraulic Ar-Snowblower; -85-In1
21***90Cylinder Group-Hydraulic1
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261-4422 Hydraulic Ar-Snowblower -73-In
21***90Cylinder Group-Hydraulic1
26***22Hydraulic Ar-Snowblower; -73-In1
26***31Lines Group-Connecting; -73-In1
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212-4573 Hydraulic Ar-Snowblower -73-In
21***73Hydraulic Ar-Snowblower; -73-In1
21***90Cylinder Group-Hydraulic1
21***15Lines Group-Connecting; -73-In1
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261-4425 Hydraulic Ar-Snowblower -85-In
21***90Cylinder Group-Hydraulic1
26***25Hydraulic Ar-Snowblower; -85-In1
26***32Lines Group-Connecting; -85-In1
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215-2881 Lines Gp-Connecting -85-In
03***55Locknut; (5/16-18-Thd)(Marked X)2
19***25Fitting As; (Quick Disconnect, Female)1
19***26Fitting As; (Quick Disconnect, Male)1
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261-4431 Lines Gp-Connecting -73-In
10***03Plate-Cover1
14***48Fitting As; (Quick Disconnect, Male)1
14***49Fitting As; (Quick Disconnect, Female)1
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214-9362 Lines Gp-Connecting -67-Inch
10***03Plate-Cover1
14***15Connector As4
14***16Connector Group1
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214-3515 Lines Gp-Connecting -73-In
10***03Plate-Cover1
14***15Connector As4
14***16Connector Group1
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261-4432 Lines Gp-Connecting -85-In
10***03Plate-Cover1
14***48Fitting As; (Quick Disconnect, Male)1
14***49Fitting As; (Quick Disconnect, Female)1
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212-4576 Manifold Gp-Control
21***76Manifold Group-Control1
21***18Valve-Solenoid4
21***19Solenoid4
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227-5484 Manifold Gp-Control
10***08Kit-Seal; (Solenoid Valve, Quick Steer)1
19***27Kit-Seal; (Pressure Reducing Valve)1
19***95Valve Group-Solenoid; (Swing/Extension)2
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261-4435 Manifold Gp-Control
19***95Valve Group-Solenoid; (Swing/Extension)2
22***87Coil4
22***05Valve Group-Relief; (Secondary)1
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213-7191 Motor Gp-Gerotor -Auger, 73-In
17***46Kit-Seal1
21***91Motor Group-Gerotor; -Auger, 73-In1
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213-7192 Motor Gp-Gerotor
17***46Kit-Seal1
21***92Motor Group-Gerotor1
22***72Key1
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212-4587 Motor Gp-Gerotor -Deflector
1B***14Key-Woodruff1
1G***32Kit-Seal1
21***87Motor Group-Gerotor; -Deflector1
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216-0795 Motor Gp-Gerotor
17***46Kit-Seal1
21***95Motor Group-Gerotor1
22***72Key1
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212-4588 Motor Gp-Gerotor -Auger, 67-In
17***46Kit-Seal1
21***88Motor Group-Gerotor; -Auger, 67-In1
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227-5496 Motor Gp-Gerotor
17***46Kit-Seal1
22***96Motor Group-Gerotor1
3J***54Packing,Preformed Part Of Kit P/N 5r***271
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227-5510 Motor Gp-Gerotor
17***46Kit-Seal1
22***10Motor Group-Gerotor1
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216-0794 Motor Gp-Gerotor -Auger, 85-In
17***46Kit-Seal1
21***94Motor Group-Gerotor; -Auger, 85-In1
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212-4589 Motor Gp-Gerotor
17***46Kit-Seal1
21***89Motor Group-Gerotor1
22***72Key1
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7x-4286 Motor Gp-Gerotor
09***38Plug1
5E***56Seal4
5E***59Seal1
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Service Equipment And Supplies
212-4574 Plate & Film Gp -73-Inch
12***56Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare)1
15***15Plate-Identification1
15***16Film-Warning; (Flying Debris, Read Omm)(Auger Debris)2
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261-4423 Plate & Film Gp
12***56Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare)1
15***62Film-Information; (Tie-Down Location)2
22***45Film-Warning; (Crush Hazard, Stay Back)2
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212-4580 Plate & Film Gp -85-In
12***56Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare)1
15***16Film-Warning; (Flying Debris, Read Omm)(Auger Debris)2
15***17Film-Warning; (Entanglement Hazard, Stay Back)(Auger)2
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261-4426 Plate & Film Gp
12***56Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare)1
15***62Film-Information; (Tie-Down Location)2
22***45Film-Warning; (Crush Hazard, Stay Back)2
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212-4568 Plate & Film Gp -67-In
12***56Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare)1
15***16Film-Warning; (Flying Debris, Read Omm)(Auger Debris)2
15***17Film-Warning; (Entanglement Hazard, Stay Back)(Auger)2
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Work Tool Arrangement
227-5500 Snowblower Ar -67-In
21***64Wiring Group-Work Tool; -Deflector Control1
21***65Drive Group-Snowblower; -67-In1
21***66Frame Group-Snowblower; -67-In1
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212-4543 Snowblower Ar -85-In
21***43Snowblower Ar; -85-In1
21***64Wiring Group-Work Tool; -Deflector Control1
21***78Frame Group-Snowblower; -85-In1
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227-5502 Snowblower Ar -85-In
21***64Wiring Group-Work Tool; -Deflector Control1
21***78Frame Group-Snowblower; -85-In1
21***79Hydraulic Ar-Snowblower; -85-In1
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227-5501 Snowblower Ar -73-In
21***64Wiring Group-Work Tool; -Deflector Control1
21***71Drive Group-Snowblower; -73-In1
21***72Frame Group-Snowblower; -73-In1
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212-4542 Snowblower Ar -73-In
21***42Snowblower Ar; -73-In1
21***64Wiring Group-Work Tool; -Deflector Control1
21***71Drive Group-Snowblower; -73-In1
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261-4421 Snowblower Ar -85-In
21***78Frame Group-Snowblower; -85-In1
26***19Wiring Group-Work Tool1
26***21Snowblower Ar; -85-In1
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261-4420 Snowblower Ar -73-In
21***72Frame Group-Snowblower; -73-In1
26***19Wiring Group-Work Tool1
26***20Snowblower Ar; -73-In1
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212-4541 Snowblower Ar -67-In
21***41Snowblower Ar; -67-In1
21***64Wiring Group-Work Tool; -Deflector Control1
21***65Drive Group-Snowblower; -67-In1
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Work Tools
216-2293 Drive Gp-Snowblower -85-In
02***87Fitting-Grease; (Universal Joint)4
1K***72Locknut Horn To Guard18
21***44Sprocket Group; (16-Teeth, Impeller)1
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261-4424 Drive Gp-Snowblower -73-In, 85-In
02***87Fitting-Grease; (Universal Joint)1
1K***72Locknut Horn To Guard18
21***44Sprocket Group; (16-Teeth, Impeller)1
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212-4571 Drive Gp-Snowblower -73-In
02***87Fitting-Grease; (Universal Joint)4
1K***72Locknut Horn To Guard18
21***44Sprocket Group; (16-Teeth, Impeller)1
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212-4565 Drive Gp-Snowblower -67-In
02***87Fitting-Grease; (Universal Joint)4
1K***72Locknut Horn To Guard18
21***44Sprocket Group; (16-Teeth, Impeller)1
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SR17 serial number reference

The PIN tag for this work tool is a riveted metal plate on the attachment mainframe/frame near the quick-coupler mounting plate, not on a host machine. Read the first 3 characters as the model/plant prefix (SBA for SR17) and the following digits as the build sequence number for that prefix.

PrefixIdentifies
SBASR17 Snowblower - 1.7 m (67 in) standard-flow, hydraulic work tool for skid steer, compact track, and compact wheel loaders

Frequently asked questions

What engine does the Cat SR17 snow blower have?

None. The SR17 is a passive work tool; its auger and impeller are driven hydraulically off the host skid steer loader, compact track loader, or compact wheel loader's auxiliary hydraulic circuit through a chain drive. The engine, hydraulic reservoir, and cooling system all belong to the carrier machine, not the attachment.

What is the operating weight of the Cat SR17 snow blower?

Not published for this specific model. No standalone numeric spec sheet with a weight figure has surfaced for the SBA-prefix SR17. Confirm the exact weight and the carrier hydraulic flow it requires with a Cat dealer or the attachment's data plate before ordering a coupler or arranging transport.

What replaced the Cat SR17 snow blower?

No documented successor. The SR17 is a distinct, older SBA-prefix design with a chain-driven auger/impeller and shear-pin protection, covered by the same factory service manual as siblings SR18 and SR21. It is a separate naming family from the later SR117/SR118/SR121/SR318/SR321 direct-drive line; no source ties the two together as a generational lineage.

What SR17 owners discuss

Does the SR17 need high-flow hydraulics, or will a standard-flow skid steer or track loader run it fine?
The SR17 is built around a standard-flow auxiliary circuit, not a high-flow one. Owners of this and similar two-stage blower attachments consistently flag that feeding a standard-flow blower motor with a high-flow carrier overspins the auger and impeller, which shortens motor and bearing life fast and can shear pins with no obstruction at all. Match the carrier's rated auxiliary gpm to the attachment's motor rating before running it, and back off engine rpm rather than running wide open if flow is on the high side.
What's the most common wear item people replace on this style of two-stage snow blower attachment?
Auger and impeller shaft bearings top the list. Packed snow, slush refreeze, and grit worked into the housing wear these out faster than almost anything else on the machine, and a failing bearing usually announces itself as a growl or knock that gets louder under load before the shaft binds. Regular greasing at the interval in the service manual and pulling the housing covers once a season to check for play is the standard preventive routine reported by long-term owners.
The auger stalls or the pin shears out even when there's no rock or curb strike. What's going on?
On this generation of blower, the auger and impeller are typically tied together through a chain-and-sprocket drive off a single hydraulic motor rather than separate direct-drive motors like newer units use. Chain stretch, a dry or rusted chain, or a partially seized bearing all add drag that mimics an obstruction and shears the pin protecting the drivetrain. Chain wear in this kind of ice-and-slush environment is expected annually with real use, so before blaming the pin, pull the chain cover, check tension and lubrication, and confirm both shafts turn freely by hand. A sheared pin that keeps recurring with no visible strike is a drivetrain-drag symptom, not bad luck.
Chute won't rotate, or it rotates but drifts back on its own. Is that a hydraulic problem?
Chute rotation on this attachment runs off its own small hydraulic circuit or a mechanical worm/gear linkage depending on how the unit is set up, and both wear points show up in the field. A chute that creeps back under vibration usually points to a worn detent or loose mechanical linkage rather than a hydraulic leak; one that won't move at all is more often a stuck or corroded rotation valve, a pinched hose, or ice packed into the pivot ring after a wet snow. Free up the pivot and cycle it by hand before assuming the motor or valve has failed.
How do people check skid shoes and the cutting edge, and when do they need adjustment versus replacement?
Skid shoes and the bolt-on cutting edge are the parts meant to wear so the auger housing doesn't. Owners set skid shoe height to leave a small air gap over pavement so the edge doesn't chatter or dig in on uneven surfaces, and they re-adjust that gap as the shoes wear down through the season. Reversible edges get flipped once the working face rounds over, then replaced once both faces are worn. A shoe that's cracked, bent, or worn thin enough that the housing itself is starting to drag on pavement should be swapped immediately rather than adjusted, since continued use at that point transfers wear straight to the housing.
What should I actually crawl under and check before buying a used SR17?
Start with the quick-attach coupler plate and pins for elongation or cracking at the mounting ears, since a sloppy fit there shows up as attachment sway and hose chafe later. Pull the auger and impeller shaft covers and check bearing play and chain condition/lubrication rather than trusting how the unit looks from outside. Check the hydraulic motor and hose fittings for weeping or stains, since the motor and its drive components are the expensive parts to replace, not the augers or edges. Cycle the chute rotation through full travel and confirm it holds position without drifting. Check skid shoe and cutting edge wear against how much adjustment range is left, and confirm hoses and quick-connect couplers seat and seal without leaking under pressure. Because a worn coupler, weeping motor seal, or elongated mounting pin affects how securely the attachment stays locked to the carrier under load, have your dealer verify coupler and pin condition before putting the unit into daily use.
Is there anything electrical to worry about on this attachment, like sensors or a control module?
No. This is a fully passive, hydraulically driven attachment with no engine, no ECM, and no onboard sensors of its own. Any "electrical" complaint traced back to the blower is almost always a carrier-side issue: a 14-pin harness pin that's backed out, a chute-rotation switch or joystick button on the cab controls, or a proportional valve on the carrier's auxiliary circuit. If in-cab chute or flow controls stop responding, check the carrier's harness and connector pins first rather than the attachment itself.

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

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