Caterpillar BP15
Maintenance schedule, common problems & OEM parts breakdown
The Cat BP15 is a passive, purely hydraulic pickup broom work tool — it carries no engine, transmission, or onboard power source of its own and draws all of its motion from the host carrier's auxiliary hydraulic circuit. It mounts through the Cat mechanical quick-coupler system onto skid steer loaders and multi terrain loaders, with the broader Cat broom lineup also fitting compact track loaders, compact wheel loaders, and backhoe loaders depending on series and coupler match. A single direct-drive, unidirectional gerotor motor (250 cm³ displacement) turns the 1524 mm (60 in) wide, 660 mm (26 in) diameter brush core, sweeping material up and over into an integrated hopper bucket rather than forcing it under previously collected debris. Hopper capacity runs about 0.42 m³ (0.55 yd³) struck, and the unit weighs roughly 395 kg (870 lb) with the optional all-steel wire gutter brush fitted for edge and gutter work. Note that the BP15 and the later BP15B are distinct siblings in the Cat broom family with different weight, motor displacement, and dimensions — not the same product reissued under a new suffix, despite sharing the same 1524 mm sweep width and general layout.
In the used and parts market, pickup brooms like the BP15 trade as bolt-on accessories that outlive several carrier changes, since the tool carries no engine hours to track and its main wear items — bristle sections, hoses, seals, and the cutting edge — are simple field replacements rather than shop rebuilds. Buyers shopping a used unit need to confirm the host machine's auxiliary hydraulic output falls inside the BP15's rated 30-83 L/min (8-22 gpm) flow range at 145-227 bar (2,100-3,300 psi); flow below that range slows brush speed and pickup quality, while flow beyond the tool's rating accelerates drive-motor and seal wear. Because sweep width and general layout look similar across the BP15, BP15B, and BP18 family, matching the exact model and its own spec sheet to the correct carrier — rather than assuming interchangeability — is what keeps a broom performing to rating instead of wearing out its drive motor early.
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 BP15 specifications
Engine
| Power source | No onboard engine. Hydraulically driven work tool, powered by the host Cat Skid Steer Loader or Multi Terrain Loader's auxiliary hydraulic circuit. |
| Drive system | Direct drive. Single variable-speed, unidirectional gerotor-style hydraulic motor, keyed into a tapered hub on the brush core. |
| Motor displacement | 250 cm3 (15.3 in3) effective displacement |
| Emissions tier | Not applicable — no combustion engine on this work tool |
Weights
| Unit weight (with gutter brush) | 395 kg (870 lb) |
| Shipping weight | Not separately published — treat as close to unit weight for this attachment class |
| Ground pressure | Not applicable — passive/hydraulic attachment, no ground-bearing chassis of its own |
Dimensions
| Overall width | 1828 mm (72 in) |
| Sweeping width | 1524 mm (60 in) |
| Height | 787 mm (31 in) |
| Length | 1575 mm (62 in) |
| Brush diameter | 660 mm (26 in) |
Performance
| Required hydraulic flow range | 30-83 L/min (8-22 gpm) |
| Optimal hydraulic pressure range | 145-227 bar (2100-3300 psi) |
| Rated brush speed | 150 rpm at 38 L/min (10 gpm) supply |
| Hopper capacity (struck) | 0.42 m3 (0.55 yd3), rated per ISO 7546:1983 and SAE J742 |
| Host machine compatibility | Cat Skid Steer Loaders 216 (liftarm height restricted to 1 m/3 ft above ground to avoid tipping), 226, 228, 236, 246, 248, 232, 242, 252, 262; Cat Multi Terrain Loaders 247 and 257. Not recommended on 267 or 277 Multi Terrain Loaders. |
| Sweeping action | Over-the-brush pickup method deposits material into an integrated hopper bucket; brush core sweeps material forward without forcing it under previously collected debris. |
Service capacities (summary)
| Fuel tank | Not applicable — no engine or fuel system on this work tool |
| Hydraulic system | No dedicated onboard reservoir — draws directly from host machine's hydraulic system within the flow/pressure ranges listed under Performance |
| Engine oil | Not applicable |
| Cooling system | Not applicable |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
BP15 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not applicable — BP15 has no onboard engine | Not applicable |
| Cooling system | Not applicable — BP15 has no onboard cooling system | Not applicable |
| Fuel tank | Not applicable — BP15 has no onboard fuel tank | Not applicable |
| Transmission / powertrain compartments | Not applicable — no onboard transmission; broom shaft is hydraulic-motor driven | Not applicable |
| Final drives | Not applicable — no final drives fitted | Not applicable |
| Hydraulic system (broom drive) and tank | No dedicated onboard hydraulic tank; broom draws hydraulic flow from the host carrier's circuit. Rated operating flow range approx. 30-83 L/min (8-22 US gpm) at approx. 145-235 bar (2,100-3,400 psi), varies by carrier/configuration | Uses the host carrier's own hydraulic fluid per that carrier's OMM (e.g. Cat TDTO/HYDO or equivalent); the broom itself specifies no separate fluid fill |
| Axles / differentials | Not applicable — no axles or differentials fitted | Not applicable |
| Grease (broom shaft bearings and pivot points) | Spec only; quantity not published | Cat Multipurpose Grease (general-purpose NLGI-2 chassis grease) at listed grease fittings; no climate-specific viscosity split documented for this work tool |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar BP15 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
Servicing the BP15 beyond the schedule
Predictive Maintenance & Fluid Analysis
The BP15 has no engine or transmission of its own, so predictive care centers on the host carrier's hydraulic system and the single gerotor drive motor. Sample the carrier's hydraulic fluid on schedule and watch for metallic fines or discoloration that signal internal motor wear working its way back through the return line. Track brush shaft speed against the rated baseline near 150 rpm at 38 L/min (10 gpm); a falling speed under normal flow points to motor or coupler wear before it becomes a failure.
Corrective & Common Repairs
Most BP15 repairs are wear-item swaps, not teardown work. Replace worn or missing polypropylene/steel wire convoluted brush sections to restore sweep pattern and pickup quality. Reseal or replace leaking hose fittings and o-ring face seals rather than letting them weep. Tighten or replace the bolt-on cutting edge once it rounds over, and patch or replace the hopper hood seal and side brush stripping as soon as debris starts escaping instead of dropping into the bucket.
Overhaul & Rebuild Points
Overhaul work on the BP15 centers on the drive line and hopper structure rather than an engine. Plan to replace the gerotor motor when brush speed and torque stay low even after hose and flow checks come back clean. Inspect the motor's tapered-hub spline into the brush core for play at major service intervals. Rebuild the dual chain and loader-arm bracket dump system if links stretch, and address hopper cracking or cutting-edge mount fatigue before it spreads further.
Seasonal & Environment Servicing
Warm the carrier's hydraulic oil before running the BP15 at full 30-83 L/min flow in cold weather to protect the gerotor motor from cavitation on startup. Drain the optional water sprinkler kit ahead of freezing temperatures to prevent cracked lines. Switch to all-steel wire brush sections for aggressive winter debris and back to polypropylene/wire for routine paved-surface sweeping. Store the broom resting on its guide wheel or a stand so bristles don't set with a flat spot between uses.
BP15 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| No dedicated fault code | The BP15 pickup broom has no engine, ECM, sensors, or wiring harness of its own; it is a passive gerotor-motor hydraulic attachment driven entirely by the host carrier's auxiliary hydraulic circuit. | Not applicable; there is no onboard electronic control system to generate a diagnostic code. | Diagnose using the host machine (skid steer, backhoe loader, or wheel loader) auxiliary hydraulics rather than the attachment itself. |
| Host aux-hydraulic low flow/pressure warning | Carrier displays a low auxiliary hydraulic flow or pressure indication when the work-tool circuit cannot spin the broom motor at rated speed. | Low hydraulic fluid, worn or misconfigured auxiliary pump, wrong flow setting for a pickup broom, or a restricted/leaking quick-coupler connection to the broom's gerotor motor. | Check carrier hydraulic fluid level and quick-coupler engagement first, then verify aux hydraulic flow settings match the broom's rated requirement before inspecting the broom's hose and motor for leaks or damage. |
| Host work-tool not recognized / hydraulic circuit fault | Some carriers flag a generic work-tool or auxiliary-circuit fault when no flow is detected at the coupler, which can occur with any passive attachment including the broom. | Broom hoses not fully connected, a stuck or damaged coupler, or the carrier's aux circuit disabled/locked out. | Confirm both quick-couplers are fully seated and the carrier's auxiliary hydraulics are enabled, then cycle the aux control to re-test flow. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
BP15 attachments & work tools
Work tool identity
The BP15 is a hydraulically driven pickup broom, not a self-propelled carrier. It uses a rotating brush core to sweep debris into an integrated hopper for controlled dumping, with a maximum sweeping width of about 60 in (1524 mm).
Compatible host-carrier classes
Sold as a mount-on work tool for skid steer loaders, compact track loaders, multi terrain loaders, compact wheel loaders, small wheel loaders, and backhoe loaders, the machine classes Cat markets its pickup broom line against.
Coupler and mounting system
Attaches via the carrier's standard quick-attach mounting plate common to Cat skid steer style loaders and backhoe loaders, with the hydraulic circuit connected through flat-face auxiliary hydraulic quick couplers.
Hydraulic flow and pressure requirement
Needs a continuous supply of auxiliary hydraulic flow from the host machine to spin the brush core; exact flow and pressure figures vary by carrier and configuration/series, so match the broom to the host's rated auxiliary circuit before ordering.
Guarding and cutting-edge options
An optional bolt-on cutting edge can be fitted to the hopper lip to extend wear life in severe sweeping applications, protecting the hopper structure from abrasive contact with the ground.
Edge-sweep and dust-control options
An optional all-steel wire gutter brush mounts to either the left or right side of the broom assembly to pull material out of gutters and along pavement edges, and an optional water sprinkler kit is available for dust suppression during sweeping.
Brush material configurations
Standard brush sections combine replaceable polypropylene and steel wire segments, with optional all-polypropylene or all-steel-wire replacement brush sets for different debris and surface conditions.
Family relationship to BP15B
BP15B is a distinct, later sibling model in the same pickup-broom family rather than a confirmed identical unit; its published specifications (hopper capacity, flow range, specific host model list) are not carried over here since they are not confirmed to apply to the base BP15.
All BP15 assemblies by section
Every catalogued assembly group for the Caterpillar BP15. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
240-8443 Bracket Gp-Broom
| 16***92 | Bracket As | 1 |
| 16***93 | Bracket As | 1 |
| 16***20 | Link-Chain | 2 |
206-7974 Bracket Gp-Broom
| 16***20 | Link-Chain | 2 |
| 16***21 | Chain As | 2 |
| 20***74 | Bracket Group-Broom | 1 |
246-9801 Bracket Gp-Broom
| 16***20 | Link-Chain | 2 |
| 16***21 | Chain As | 2 |
| 24***01 | Bracket Group-Broom | 1 |
165-9890 Bracket Gp-Broom
| 16***90 | Bracket Group-Broom | 1 |
| 16***20 | Link-Chain | 2 |
| 16***21 | Chain As | 2 |
258-6413 Bracket Gp-Broom
| 16***20 | Link-Chain | 2 |
| 16***21 | Chain As | 2 |
| 24***30 | Bracket As | 2 |
165-9889 Bracket Gp-Broom
| 16***89 | Bracket Group-Broom | 1 |
| 16***92 | Bracket As | 1 |
| 16***93 | Bracket As | 1 |
165-5349 Frame Gp-Broom
| 13***43 | Bolt-Round Head; (M6x1-6g-Thd) | 2 |
| 16***49 | Frame Group-Broom | 1 |
| 16***19 | Pin As | 2 |
165-5347 Frame Gp-Debris
| 13***94 | Edge-Cutting | 1 |
| 15***53 | Screw-Flat Head; (M16x2.00 Thd) | 8 |
| 16***47 | Frame Group-Debris | 1 |
Hydraulic System
165-9056 Lines Gp-Connecting
| 15***94 | Coupler As-Quick Disconnect; (Female)(Quick Disconnect) | 1 |
| 15***95 | Fitting As; (Quick Disconnect, Male) | 1 |
| 16***56 | Lines Group-Connecting | 1 |
165-9886 Lines Gp-Connecting
| 16***86 | Lines Group-Connecting | 1 |
| 16***18 | Tube As | 1 |
| 16***19 | Tube As | 1 |
165-9067 Lines Gp-Connecting
| 16***67 | Lines Group-Connecting | 1 |
| 17***82 | Hose As | 2 |
| 2M***80 | Seal--To Connector Pump Outlet | 2 |
Service Equipment And Supplies
191-1124 Kit-Roading Plate & Mounting -Roading
| 17***15 | Film; (Reflective)(Warning) | 4 |
| 18***98 | Plate | 2 |
| 19***24 | Kit-Roading Plate & Mounting; -Roading | 1 |
165-5348 Plate & Film Gp
| 15***36 | Film-Warning; (Read Operation Manual) | 1 |
| 16***48 | Plate & Film Group | 1 |
| 16***72 | Film; (Cat, Bp15) | 1 |
Work Tool Arrangement
165-5346 Broom Ar-Pickup
| 16***46 | Broom Ar-Pickup | 1 |
| 16***47 | Frame Group-Debris | 1 |
| 16***48 | Plate & Film Group | 1 |
165-9900 Brush Ar-Gutter
| 16***65 | Brush Group-Gutter | 1 |
| 16***67 | Lines Group-Connecting | 1 |
| 16***00 | Brush Ar-Gutter | 1 |
Work Tools
296-3649 Bracket Gp-Mounting
| 24***30 | Bracket As | 2 |
| 25***14 | Rod As | 2 |
| 29***49 | Bracket Group-Mounting | 1 |
165-5351 Brush Gp-Broom -Poly & Wire
| 16***51 | Brush Group-Broom; -Poly & Wire | 1 |
| 16***69 | Kit-Brush; -Polypropylene | 1 |
| 16***70 | Kit-Brush; -Wire | 1 |
165-9065 Brush Gp-Gutter
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 1 |
| 13***40 | Key-Square | 1 |
| 16***65 | Brush Group-Gutter | 1 |
165-5350 Drive Gp-Broom
| 16***50 | Drive Group-Broom | 1 |
| 16***06 | Motor Group-Gerotor | 1 |
| 16***07 | Kit-Seal | 1 |
165-9070 Kit-Brush -Wire
| 16***70 | Kit-Brush; -Wire | 1 |
| 16***87 | Bristle As-Wire | 17 |
165-9069 Kit-Brush -Polypropylene
| 16***69 | Kit-Brush; -Polypropylene | 1 |
| 16***88 | Bristle As-Polypropylene | 18 |
256-9335 Kit-Water Spray -Lines, Dust Control
| 00***86 | Connector-Hose (1/4-18nptf Thd) | 2 |
| 12***56 | Clamp-Hose | 10 |
| 17***92 | Coupling | 1 |
173-0216 Kit-Water Spray -Dust Control
| 00***86 | Connector-Hose (1/4-18nptf Thd) | 2 |
| 12***56 | Clamp-Hose | 10 |
| 17***16 | Kit-Water Spray; -Dust Control | 1 |
BP15 serial number reference
The PIN plate on a Cat pickup broom is riveted to the frame or mount plate near the hydraulic drive motor or hopper mounting bracket, not on the brush itself. Read the first 3 characters as the serial prefix identifying the work-tool model line, followed by a 5 or 8 digit sequence number that places the unit within that prefix's production run.
| Prefix | Identifies | Notes |
|---|---|---|
| ACT | BP15 Pickup Broom, base/only machine line | Runs ACT00001-UP. Passive hydraulically driven pickup broom work tool, no engine fitted; mounts on compact wheel loaders, skid steers and backhoe loaders. Confirm with dealer for plant/region and exact production years, not published in available listings. |
Frequently asked questions
What powers the BP15 broom and how does its drive system work?
The BP15 has no engine of its own. It runs on a single, direct-drive, unidirectional gerotor-style hydraulic motor (250 cm³ displacement) fed by the host carrier's standard-flow auxiliary hydraulic circuit, turning the brush core directly with no belts or chains in the drive path.
What is the BP15's sweep width and hopper capacity?
The BP15 sweeps a 1524 mm (60 in) path and carries a struck hopper capacity of about 0.42 m³ (0.55 yd³), rated per ISO 7546:1983 and SAE J742. Overall unit weight is about 395 kg (870 lb) with the optional gutter brush installed.
What carriers is the BP15 compatible with?
It's built for Cat skid steer loaders and multi terrain loaders through the standard mechanical quick-coupler interface, matched to hosts delivering roughly 30-83 L/min (8-22 gpm) at 145-227 bar (2,100-3,300 psi) of auxiliary hydraulic flow. The wider Cat broom lineup also covers compact track loaders, compact wheel loaders, and backhoe loaders, though exact carrier fit varies by series — match the host's hydraulic output to the tool's rated flow range rather than assuming any loader-class carrier will work.
What BP15 owners discuss
What hydraulic flow and pressure does the BP15 pickup broom actually want from the carrier?
Why do the bristles wear out so much faster than owners expect?
The hopper is spilling dust and material instead of catching it. What's going on?
Any recurring hose or coupler complaints with this type of broom?
Do I need a separate gutter brush, or does the pickup broom cover curbs and edges on its own?
The broom won't spin, or bogs down under load. What do people check first?
What should I look at before buying a used BP15?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific BP15 part?
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