Caterpillar SR18
Maintenance schedule, common problems & OEM parts breakdown
The Cat SR18 is a two-stage snow blower work tool, not a self-propelled machine. It carries no engine, ECM, or fuel system; the auger and impeller run off the carrier's auxiliary hydraulic circuit, and the unit mounts to skid steer loaders, compact track loaders, and multi-terrain loaders through a standard quick-attach frame. Overall width is about 1880 mm (74 in) with a 1613 mm (63.5 in) intake, the only dimensions documented for this specific model; operating weight and hydraulic flow/pressure figures are not published for the SR18 itself. Cat offered the SR18 in the early-to-mid 2000s under serial prefix SBB, part of a three-width family with the narrower SR17 (SBA) and wider SR21 (SBC), all covered by operation and maintenance manual SEBP3542. It runs reversible auger and impeller stages, a hydraulically adjustable discharge chute, and an electric switch for chute and deflector control, an older control scheme that predates the joystick-actuated chutes on Cat's later SR117-series line. No factory configuration options beyond the single 74 in width are documented for this model.
Across the SR17/SR18/SR21 family the differences are width and intake capacity, not powertrain: all three share the same chain-driven gearbox, electric chute control, and hydraulic-motor drive, so wear points and service procedures carry across the line. Cat's later snow blower generation (SR117, SR118, SR121, SR318, SR321) moved to joystick-actuated chutes and, on some configurations, higher hydraulic flow options; the SR318 is close to the SR18 in overall width and intake width, but Cat does not document it as a direct replacement. In the used and parts market the SR18 still turns up on municipal, landscaping, and rental fleets that want a simple, mechanically driven two-stage blower with no engine or emissions system to maintain. Parts demand centers on wear items rather than powertrain overhaul: shear pins, auger flighting, skid shoes and cutting edges, drive chain and sprockets, gearbox seals, and the hydraulic motor and hoses that link it to the carrier.
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 SR18 specifications
Engine
| Power source | No onboard engine. The SR18 is a passive, hydraulically driven snow blower attachment powered entirely through the carrier machine's auxiliary hydraulic circuit (skid steer loader or multi terrain loader mount). |
| Displacement / cylinders / emissions tier | Not applicable — attachment has no engine of its own. |
Weights
| Operating weight | Not published in available dealer or spec literature for this specific model. Request exact figure from a Cat dealer for your unit's configuration. |
| Shipping weight | Not documented for the SR18 in available sourcing. |
| Ground pressure | Not applicable — attachment carries no independent ground contact; weight is borne by the host loader. |
Dimensions
| Overall (transport) width | 1880 mm (74 in) |
| Intake width | 1613 mm (63.5 in) |
| Overall height / length | Not documented for the SR18 in available dealer or spec sourcing — varies with mount and chute position. |
| Wheelbase / track gauge / ground clearance | Not applicable — the SR18 is a loader-mounted attachment with no chassis, axles, or ground clearance figure of its own. |
Performance
| Cutting design | Two-stage design: front auger feeds snow to a high-speed impeller for discharge. |
| Auger / impeller reversibility | Auger and impeller run reversible, letting the operator clear jams or obstructions without leaving the seat. |
| Discharge chute control | Adjustable discharge chute with hydraulically controlled deflector; chute functions run off the carrier's electrical/hydraulic controls (this family typically uses a multi-pin electrical hookup for in-cab chute operation). |
| Chute rotation / throw distance | Not confirmed specifically for the SR18 configuration — later same-width siblings in this line publish up to 270 degrees of chute rotation, but this figure is not verified against SR18-specific literature. |
| Travel speed / gradeability | Not applicable — the attachment has no drivetrain; travel performance is governed entirely by the host carrier machine. |
Service capacities (summary)
| Fuel tank | Not applicable — no engine. |
| Hydraulic system | No dedicated onboard reservoir; the SR18 draws hydraulic flow from the host carrier's auxiliary circuit. Specific flow/pressure requirement not documented for the SR18 in available sourcing — verify compatibility with your dealer before pairing to a carrier. |
| Engine oil | Not applicable — no engine. |
| Cooling system | Not applicable — no engine. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
SR18 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not applicable | SR18 has no engine of its own. It is a passive, hydraulically driven work tool (auger/impeller and chute rotation run off the carrier machine's hydraulic circuit). |
| Cooling system | Not applicable | No engine, no coolant circuit on the attachment itself. |
| Fuel tank | Not applicable | No fuel system on the attachment. |
| Hydraulic system / tank | No dedicated tank on the attachment; runs on the carrier machine's hydraulic supply | SR18 has no onboard hydraulic reservoir. Auger, impeller, and chute-rotation motors draw flow and pressure from the skid steer loader, compact track loader, or compact wheel loader it is mounted on. Fluid type and capacity follow the carrier machine's own O&M manual (typically Cat TDTO or HYDO-class hydraulic oil, viscosity graded to ambient temperature per that machine's chart), not a separate SR18 spec. |
| Transmission / powertrain compartment | Not applicable | No separate powertrain; drive is taken directly from the carrier's hydraulic motors into the auger/impeller gear drive. |
| Final drives | Not applicable | Not used on this work tool. |
| Axles / differentials | Not applicable | Not used on this work tool. |
| Auger/impeller drive gearbox and pivot grease points | Not published in available documentation — verify fill quantity with your Cat dealer | Grease-lubricated drive and pivot points only. Use Caterpillar Multipurpose Grease (or an NLGI-2 multipurpose grease equivalent) at the listed intervals; no viscosity-by-climate split is documented for the grease itself. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar SR18 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 3,000 h |
|
Servicing the SR18 beyond the schedule
Predictive Maintenance & Fluid Analysis
The SR18 has no engine oil to sample, so predictive care centers on the drive gearbox and hydraulic interface. Pull a gearbox oil sample at scheduled intervals to check for water intrusion and wear metal from the chain and bearings before a seal lets go. Track drive chain elongation with a wear gauge rather than waiting for skipped teeth. Watch carrier hydraulic gauges for pressure or flow drop that signals a failing motor, and log skid shoe wear rates against intake height to plan replacement before the cutting edge digs into pavement.
Corrective & Common Repairs
Most SR18 downtime traces to shear pins snapping on buried debris, curb strikes, or frozen pack, and to bent or cracked auger flighting from the same impacts. Chute rotation failures usually point to the electric switch, wiring harness, or hydraulic actuator rather than the motor itself. A chain jumping teeth or running loose signals worn sprockets or a stretched chain needing full replacement, not just re-tensioning. Gearbox oil leaks at the input shaft seal are common after repeated shock loading and should be corrected before the bearing runs dry.
Overhaul & Rebuild Points
A full SR18 rebuild centers on the drive gearbox: bearings, input shaft seal, and gear set wear from years of shock-loading against ice and debris. Replace the drive chain, sprockets, and tensioner as a matched set rather than mixing worn and new components. Impeller housing liners and auger flighting wear thin from abrasive road sand and salt and should be replaced before metal-to-metal contact opens clearances. Inspect the main frame and mounting arms for stress cracks at weld joints, the usual failure point on units with heavy curb and debris contact.
Seasonal & Environment Servicing
Before first snowfall, cycle the chute and deflector through full range to confirm the electric switch and actuator respond, and grease every pivot and shaft bearing after summer storage. Road salt and slush accelerate corrosion on the chute, auger shaft, and mounting frame, so rinse and dry the unit after wet, heavy-snow events rather than letting brine sit. At season's end, drain moisture from the gearbox breather, coat exposed shafts and pins with a corrosion inhibitor, and store the attachment off the ground so skid shoes and cutting edge don't corrode into the pavement.
SR18 attachments & work tools
Snow blower work-tool class
SR18 is a roughly 1.9 m (74 in) overall width, two-stage snow blower work tool for skid steer loaders, dating to the early-2000s Cat attachment line. It uses an auger to feed snow into an impeller/fan stage that throws it clear of the machine; both auger and impeller reverse from the cab to clear jams without dismounting.
Series sizing (SR17/SR18/SR21 trio)
SR18 sits as the mid-size unit in a three-model width series alongside the narrower SR17 and the wider SR21 (documented with an 18 in auger). Intake width for SR18 is about 1.61 m (63.5 in), between its two siblings; exact auger diameter and weight for SR18 are not published online - verify against the dealer spec sheet or O&M manual.
Skid steer mounting/coupler
Attaches via the standard industry skid-steer quick-attach (SSQA) plate used by Cat skid steer and compact loaders of that era, plus standard auxiliary hydraulic hose couplers. No separate carrier-specific mounting hardware beyond the attach plate is documented.
Hydraulic drive arrangement
The auger/impeller is driven from the host machine's auxiliary hydraulic circuit rather than a dedicated pump. A specific required flow/pressure figure for this exact series isn't documented in available literature; treat as varies by host-machine configuration and confirm with the dealer or operation and maintenance manual before pairing with a carrier.
Chute and deflector control
Chute rotation and deflector angle are adjusted with electric switch controls from the operator's seat on this series, ahead of the fully hydraulic joystick-actuated chute control used on Cat's later, differently-numbered snow blower line. Rotation direction lets snow be discharged to the front or side to keep it off the operator's path.
Wear edge and skid shoes
Fitted with a bolt-on, reversible cutting edge and skid shoes at the auger housing, standard across Cat's two-stage snow blower work tools of this size class. Skid shoes set the ground clearance/cutting height and extend wear life on the housing itself.
All SR18 assemblies by section
Every catalogued assembly group for the Caterpillar SR18. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Electrical System
261-4419 Wiring Gp-Work Tool
| 10***67 | Washer-Hard; (7.2x25x2-mm Thk) | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 3 |
| 11***15 | Relay As; (12-Volt)(Junction Box) | 2 |
212-4564 Wiring Gp-Work Tool -Deflector Control
| 03***49 | Nut-Self Lock; (No.10.Unc) | 1 |
| 15***53 | Film-Information; (Read Omm) | 1 |
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
227-5499 Wiring Gp-Work Tool -Electric Power
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***06 | Receptacle Kit; (Includes Wedge And Receptacle Assem.) | 1 |
| 11***99 | Gasket; (Air Conditioner Control) | 1 |
263-2115 Wiring Gp-Work Tool
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 10***06 | Receptacle Kit; (Includes Wedge And Receptacle Assem.) | 1 |
| 11***99 | Gasket; (Air Conditioner Control) | 1 |
Frame And Body
214-7117 Deflector Gp-Snowblower -67-In
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 6 |
| 13***85 | Rivet-Pop | 7 |
| 1D***72 | Bolt-Carriage; (1/2-13x5.5-In) | 6 |
215-1857 Deflector Gp-Snowblower -73-In, 85-In
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 6 |
| 09***43 | Pin-Cotter | 1 |
| 13***85 | Rivet-Pop | 7 |
212-4566 Frame Gp-Snowblower -67-In
| 1K***72 | Locknut Horn To Guard | 10 |
| 21***66 | Frame Group-Snowblower; -67-In | 1 |
| 21***82 | Impeller As | 1 |
212-4572 Frame Gp-Snowblower -73-In
| 1K***72 | Locknut Horn To Guard | 12 |
| 21***72 | Frame Group-Snowblower; -73-In | 1 |
| 21***22 | Support Group-Work Tool | 2 |
212-4578 Frame Gp-Snowblower -85-In
| 1K***72 | Locknut Horn To Guard | 13 |
| 21***78 | Frame Group-Snowblower; -85-In | 1 |
| 21***75 | Frame As | 1 |
213-7222 Support Gp-Work Tool
| 21***22 | Support Group-Work Tool | 1 |
| 28***93 | Tube As | 1 |
| 28***97 | Pad As; (Stabilizer) | 1 |
Hydraulic System
283-9595 Cylinder Gp-Hydraulic
| 28***95 | Cylinder Group-Hydraulic | 1 |
| 4K***77 | Nut-Self Locking | 1 |
| 7J***04 | Seal-O-Ring (Id=7.65mm) | 2 |
213-7190 Cylinder Gp-Hydraulic
| 21***90 | Cylinder Group-Hydraulic | 1 |
| 21***16 | Kit-Seal | 1 |
212-4567 Hydraulic Ar-Snowblower -67-In
| 21***67 | Hydraulic Ar-Snowblower; -67-In | 1 |
| 21***62 | Lines Group-Connecting; -67-Inch | 1 |
| 22***84 | Manifold Group-Control | 1 |
212-4573 Hydraulic Ar-Snowblower -73-In
| 21***73 | Hydraulic Ar-Snowblower; -73-In | 1 |
| 21***76 | Manifold Group-Control | 1 |
| 21***90 | Cylinder Group-Hydraulic | 1 |
261-4425 Hydraulic Ar-Snowblower -85-In
| 21***90 | Cylinder Group-Hydraulic | 1 |
| 26***25 | Hydraulic Ar-Snowblower; -85-In | 1 |
| 26***32 | Lines Group-Connecting; -85-In | 1 |
212-4579 Hydraulic Ar-Snowblower -85-In
| 21***79 | Hydraulic Ar-Snowblower; -85-In | 1 |
| 21***90 | Cylinder Group-Hydraulic | 1 |
| 21***81 | Lines Group-Connecting; -85-In | 1 |
261-4422 Hydraulic Ar-Snowblower -73-In
| 21***90 | Cylinder Group-Hydraulic | 1 |
| 26***22 | Hydraulic Ar-Snowblower; -73-In | 1 |
| 26***31 | Lines Group-Connecting; -73-In | 1 |
214-9362 Lines Gp-Connecting -67-Inch
| 10***03 | Plate-Cover | 1 |
| 14***15 | Connector As | 4 |
| 14***16 | Connector Group | 1 |
215-2881 Lines Gp-Connecting -85-In
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 2 |
| 19***25 | Fitting As; (Quick Disconnect, Female) | 1 |
| 19***26 | Fitting As; (Quick Disconnect, Male) | 1 |
261-4432 Lines Gp-Connecting -85-In
| 10***03 | Plate-Cover | 1 |
| 14***48 | Fitting As; (Quick Disconnect, Male) | 1 |
| 14***49 | Fitting As; (Quick Disconnect, Female) | 1 |
214-3515 Lines Gp-Connecting -73-In
| 10***03 | Plate-Cover | 1 |
| 14***15 | Connector As | 4 |
| 14***16 | Connector Group | 1 |
261-4431 Lines Gp-Connecting -73-In
| 10***03 | Plate-Cover | 1 |
| 14***48 | Fitting As; (Quick Disconnect, Male) | 1 |
| 14***49 | Fitting As; (Quick Disconnect, Female) | 1 |
212-4576 Manifold Gp-Control
| 21***76 | Manifold Group-Control | 1 |
| 21***18 | Valve-Solenoid | 4 |
| 21***19 | Solenoid | 4 |
227-5484 Manifold Gp-Control
| 10***08 | Kit-Seal; (Solenoid Valve, Quick Steer) | 1 |
| 19***27 | Kit-Seal; (Pressure Reducing Valve) | 1 |
| 19***95 | Valve Group-Solenoid; (Swing/Extension) | 2 |
261-4435 Manifold Gp-Control
| 19***95 | Valve Group-Solenoid; (Swing/Extension) | 2 |
| 22***87 | Coil | 4 |
| 22***05 | Valve Group-Relief; (Secondary) | 1 |
212-4589 Motor Gp-Gerotor
| 17***46 | Kit-Seal | 1 |
| 21***89 | Motor Group-Gerotor | 1 |
| 22***72 | Key | 1 |
227-5510 Motor Gp-Gerotor
| 17***46 | Kit-Seal | 1 |
| 22***10 | Motor Group-Gerotor | 1 |
216-0794 Motor Gp-Gerotor -Auger, 85-In
| 17***46 | Kit-Seal | 1 |
| 21***94 | Motor Group-Gerotor; -Auger, 85-In | 1 |
213-7192 Motor Gp-Gerotor
| 17***46 | Kit-Seal | 1 |
| 21***92 | Motor Group-Gerotor | 1 |
| 22***72 | Key | 1 |
227-5496 Motor Gp-Gerotor
| 17***46 | Kit-Seal | 1 |
| 22***96 | Motor Group-Gerotor | 1 |
| 3J***54 | Packing,Preformed Part Of Kit P/N 5r***27 | 1 |
216-0795 Motor Gp-Gerotor
| 17***46 | Kit-Seal | 1 |
| 21***95 | Motor Group-Gerotor | 1 |
| 22***72 | Key | 1 |
212-4588 Motor Gp-Gerotor -Auger, 67-In
| 17***46 | Kit-Seal | 1 |
| 21***88 | Motor Group-Gerotor; -Auger, 67-In | 1 |
7x-4286 Motor Gp-Gerotor
| 09***38 | Plug | 1 |
| 5E***56 | Seal | 4 |
| 5E***59 | Seal | 1 |
213-7191 Motor Gp-Gerotor -Auger, 73-In
| 17***46 | Kit-Seal | 1 |
| 21***91 | Motor Group-Gerotor; -Auger, 73-In | 1 |
212-4587 Motor Gp-Gerotor -Deflector
| 1B***14 | Key-Woodruff | 1 |
| 1G***32 | Kit-Seal | 1 |
| 21***87 | Motor Group-Gerotor; -Deflector | 1 |
Service Equipment And Supplies
261-4426 Plate & Film Gp
| 12***56 | Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare) | 1 |
| 15***62 | Film-Information; (Tie-Down Location) | 2 |
| 22***45 | Film-Warning; (Crush Hazard, Stay Back) | 2 |
212-4580 Plate & Film Gp -85-In
| 12***56 | Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare) | 1 |
| 15***16 | Film-Warning; (Flying Debris, Read Omm)(Auger Debris) | 2 |
| 15***17 | Film-Warning; (Entanglement Hazard, Stay Back)(Auger) | 2 |
212-4574 Plate & Film Gp -73-Inch
| 12***56 | Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare) | 1 |
| 15***15 | Plate-Identification | 1 |
| 15***16 | Film-Warning; (Flying Debris, Read Omm)(Auger Debris) | 2 |
261-4423 Plate & Film Gp
| 12***56 | Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare) | 1 |
| 15***62 | Film-Information; (Tie-Down Location) | 2 |
| 22***45 | Film-Warning; (Crush Hazard, Stay Back) | 2 |
212-4568 Plate & Film Gp -67-In
| 12***56 | Film; (Warning) (No Step) (On Top Of Hood Behind Cab On Each Side) (On Each Fender Flare) | 1 |
| 15***16 | Film-Warning; (Flying Debris, Read Omm)(Auger Debris) | 2 |
| 15***17 | Film-Warning; (Entanglement Hazard, Stay Back)(Auger) | 2 |
Work Tool Arrangement
227-5500 Snowblower Ar -67-In
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***65 | Drive Group-Snowblower; -67-In | 1 |
| 21***66 | Frame Group-Snowblower; -67-In | 1 |
261-4421 Snowblower Ar -85-In
| 21***78 | Frame Group-Snowblower; -85-In | 1 |
| 26***19 | Wiring Group-Work Tool | 1 |
| 26***21 | Snowblower Ar; -85-In | 1 |
212-4543 Snowblower Ar -85-In
| 21***43 | Snowblower Ar; -85-In | 1 |
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***78 | Frame Group-Snowblower; -85-In | 1 |
227-5502 Snowblower Ar -85-In
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***78 | Frame Group-Snowblower; -85-In | 1 |
| 21***79 | Hydraulic Ar-Snowblower; -85-In | 1 |
212-4541 Snowblower Ar -67-In
| 21***41 | Snowblower Ar; -67-In | 1 |
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***65 | Drive Group-Snowblower; -67-In | 1 |
212-4542 Snowblower Ar -73-In
| 21***42 | Snowblower Ar; -73-In | 1 |
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***71 | Drive Group-Snowblower; -73-In | 1 |
227-5501 Snowblower Ar -73-In
| 21***64 | Wiring Group-Work Tool; -Deflector Control | 1 |
| 21***71 | Drive Group-Snowblower; -73-In | 1 |
| 21***72 | Frame Group-Snowblower; -73-In | 1 |
261-4420 Snowblower Ar -73-In
| 21***72 | Frame Group-Snowblower; -73-In | 1 |
| 26***19 | Wiring Group-Work Tool | 1 |
| 26***20 | Snowblower Ar; -73-In | 1 |
Work Tools
212-4565 Drive Gp-Snowblower -67-In
| 02***87 | Fitting-Grease; (Universal Joint) | 4 |
| 1K***72 | Locknut Horn To Guard | 18 |
| 21***44 | Sprocket Group; (16-Teeth, Impeller) | 1 |
212-4571 Drive Gp-Snowblower -73-In
| 02***87 | Fitting-Grease; (Universal Joint) | 4 |
| 1K***72 | Locknut Horn To Guard | 18 |
| 21***44 | Sprocket Group; (16-Teeth, Impeller) | 1 |
216-2293 Drive Gp-Snowblower -85-In
| 02***87 | Fitting-Grease; (Universal Joint) | 4 |
| 1K***72 | Locknut Horn To Guard | 18 |
| 21***44 | Sprocket Group; (16-Teeth, Impeller) | 1 |
261-4424 Drive Gp-Snowblower -73-In, 85-In
| 02***87 | Fitting-Grease; (Universal Joint) | 1 |
| 1K***72 | Locknut Horn To Guard | 18 |
| 21***44 | Sprocket Group; (16-Teeth, Impeller) | 1 |
SR18 serial number reference
The PIN plate is riveted to the main frame or mounting plate of the snow blower housing, near the quick-coupler mount or on a side panel, not on the host skid steer or track loader. The first three characters of the PIN identify the specific model and build series; the digits that follow are the individual unit serial number.
| Prefix | Identifies | Notes |
|---|---|---|
| SBB | SR18 snow blower, skid steer/compact track loader mount | Passive work tool, no engine; runs off host machine hydraulics, with electric chute rotation controls. Production traced to around 2001. Covered under service manual SEBP3542 alongside sibling models SR17 (prefix SBA) and SR21 (prefix SBC); those sibling prefixes belong to their own models, not the SR18. Distinct from the differently numbered SR117/SR118/SR121/SR318/SR321 line, which shares a single SNB prefix under a separate manual (SEBP5210) and is not tied to SR18 by any source. |
Frequently asked questions
What engine does the Cat SR18 use?
None. The SR18 is a passive work tool attachment with no engine, ECM, or fuel system of its own. The auger and impeller run off the carrier machine's auxiliary hydraulic circuit, so the SR18 is only as powerful as the skid steer, compact track loader, or multi-terrain loader it's mounted to.
What is the SR18's operating weight?
Not published for this specific model. Cat's documentation for the SR18 lists overall width (about 1880 mm / 74 in) and intake width (about 1613 mm / 63.5 in), but weight and hydraulic flow/pressure figures were never carried into the current catalog. Check the attachment's nameplate or your dealer for a confirmed figure.
What replaced the Cat SR18?
No confirmed direct successor is documented. Cat's later snow blower lineup (SR117, SR118, SR121, SR318, SR321) moved to joystick-actuated chute control instead of the SR18's electric switch. The SR318 is close in size, with near-identical overall and intake width, but Cat does not list it as a replacement for the SR18, so treat it as a similarly sized sibling rather than a confirmed successor.
What SR18 owners discuss
How is the SR18 auger and impeller actually driven, and what does that mean for maintenance?
Throw distance has dropped off even though hydraulic flow seems fine. What's usually going on?
What causes the shear pins to break, and how should they be treated?
The chute or deflector won't move, or moves erratically. What's the likely cause?
What wear items should I expect to replace on the intake end of the blower?
Does the SR18 fit any skid steer or CTL, or are there compatibility issues to watch for?
What should I check before buying a used SR18?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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