Caterpillar BH150
Maintenance schedule, common problems & OEM parts breakdown
The Cat BH150 is a pin-on hydraulic backhoe attachment built for Cat 216-299 series skid steer loaders, compact track loaders, and multi-terrain loaders. It has no engine, ECM, transmission, or undercarriage of its own; every function runs off the host carrier's hydraulic system, drawing roughly 42-86 L/min (11-23 gpm) at pressures up to around 235 bar (3,400 psi) depending on the carrier. Operating weight runs about 1,023 kg (2,256 lb), with maximum digging depth near 3,074 mm (121 in), roughly 180 degrees of swing, and bucket breakout force around 3,241 kg (7,146 lb), figures that vary a little by configuration and spec-sheet edition. Caterpillar built it in two factory configurations by serial prefix: GGK1-UP, which adds auxiliary hydraulics at the stick end, and KEP1-UP, a standard bucket-only setup without the aux circuit. It mounts an assortment of pin-on digging, ditch-cleaning, and grading buckets along with augers, hammers, thumbs, and a vibratory plate compactor on aux-equipped units.
The GGK-versus-KEP split is the main thing to know before buying or sourcing parts. GGK units carry the extra plumbing and valving needed to run hammers, augers, and hydraulic thumbs from the stick, while KEP units are simpler bucket-only machines with less to maintain and fewer leak points. That auxiliary circuit matters because it is what turns the BH150 from a straight digging tool into a multi-tool carrier able to run demolition hammers or auger drives without swapping the whole attachment. The BH150 remains relevant in the used and parts market because it bolts onto an enormous installed base of Cat 216-299 series loaders, has no powertrain or undercarriage to wear out, and its maintenance load is limited to greasing pins and servicing cylinders rather than engine or drivetrain overhaul. That low ownership cost, combined with pin-on tool simplicity instead of a bucket-side quick-coupler system, keeps well-maintained units and their pins, bushings, and cylinders in steady demand.
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 BH150 specifications
Engine
| Power source | No engine or power unit of its own. The BH150 is a hydraulically driven backhoe work tool; boom, stick, bucket, swing, stabilizer, and side-shift functions all run off the host carrier's own hydraulic system through in-cab controls. |
| Hydraulic operating pressure | 230 bar (3,336 psi) maximum, supplied by the carrier machine |
| Carrier machines (earlier lineup) | Cat Skid Steer Loaders 216B, 226B, 232B, 242B and Cat Multi Terrain Loaders 247B, 257B rated for optimum or acceptable performance; 236B, 246B, 248B, 252B, 262B, 268B, 267B, 277B, 287B listed as not approved for this attachment |
| Carrier machines (later lineup) | Cat Skid Steer Loaders 216B3, 226B3; Compact Track/Multi Terrain and D-series loaders 226D, 232D, 236D, 239D, 242D, 246D, 249D, 257D, 259D, 262D, 272D (and XHP/D2 variants), 277D, 279D, 287D, 289D, 297D (and XHP/D2 variants), 299D (and XHP/D2 variants) |
Weights
| Operating weight | 1023 kg (2,256 lb) |
| Shipping weight | Not published as a separate figure — attachment carries no onboard fluids beyond hose oil, so shipping weight is effectively the same as operating weight |
| Ground pressure | Not published — the BH150 is a boom-mounted work tool, not a ground-bearing undercarriage, so a ground pressure figure does not apply |
Dimensions
| Overall length (operating) | 2776 mm (109 in) |
| Overall operating height | 3442 mm (136 in) |
| Transport height | 2336 mm (92 in) |
| Transport width | 1968 mm (77 in) per earlier factory literature, 2008 mm (79 in) per later edition — figure varies slightly by document edition |
| Transport length (with 457 mm / 18 in bucket) | 747 mm (29 in) |
| Boom pivot height | 425 mm (17 in) |
| Ground clearance | 85.7 mm (3.4 in) |
| Stabilizer spread, operating position | 1716 mm (68 in) |
| Total side-shift travel | 822 mm (32 in) per factory spec table (a separate features narrative in the earlier catalog cites 736.6 mm / 29 in manual side-shift — treat as the same feature, minor figure variance across document sections) |
| Maximum digging depth | 3074 mm (121 in) |
| Digging depth, 610 mm (2 ft) flat bottom | 3040 mm (120 in) |
| Digging depth, 2438 mm (8 ft) flat bottom | 2593 mm (102 in) |
| Straight wall digging depth | 2064 mm (81 in) |
Performance
| Loading height | 2147 mm (85 in) |
| Loading reach | 1628 mm (64 in) |
| Reach from swing pivot at ground | 3955 mm (156 in) |
| Swing arc | 180 to 182 degrees, depending on document edition |
| Bucket rotation | 192 degrees |
| Bucket breakout force | 3241 kg (7,146 lb) |
| Stick breakout force | 1560 kg (3,439 lb) |
| Compatible hammer attachments (earlier lineup) | H55Ds and H63/H63s hydraulic hammers |
| Compatible hammer attachments (later lineup) | H55Es and H65Es hydraulic hammers |
| Other compatible work tools | Digging, grading, heavy-duty, ditch-cleaning, and tilting ditch-cleaning buckets from roughly 260 mm (10 in) to 1400 mm (55 in) wide; A14B and A19B augers; a 490 mm (19 in) ripper tooth; and a CVP16 vibratory plate compactor, plus an optional mechanical quick coupler |
Service capacities (summary)
| Fuel tank | Not applicable — no engine on the attachment |
| Hydraulic system | No dedicated onboard reservoir; the tool runs on the carrier machine's hydraulic circuit at up to 230 bar (3,336 psi) |
| Engine oil | Not applicable — no engine on the attachment |
| Cooling system | Not applicable — no engine on the attachment |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
BH150 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Grease – pivot pins and bushings (boom, stick, bucket linkage, swing/mount points) | Not a fill capacity — lubricate each grease fitting per the lube-point schedule until fresh grease purges at the joint | Cat Prime Application Grease, NLGI 2, greater than 3% molybdenum (or an equivalent extreme-pressure multipurpose EP2 grease); in sub-zero/arctic climates switch to a softer NLGI 1 or arctic-grade EP grease so the pins still take grease in the cold |
| Engine crankcase (with filter) | Not applicable — the BH150 is a pin-on backhoe attachment for skid steer, compact track, and multi-terrain loaders; it has no engine of its own | N/A — engine oil is serviced on the host carrier machine per that machine's own OMM |
| Cooling system | Not applicable — no engine, no coolant system on the attachment | N/A |
| Fuel tank | Not applicable — no fuel system on the attachment | N/A |
| Transmission/powertrain compartments | Not applicable — the attachment has no powertrain; it is driven entirely by the carrier's auxiliary hydraulics | N/A |
| Final drives | Not applicable — no final drives on this attachment | N/A |
| Hydraulic system and tank | Not applicable as a standalone capacity — the BH150 has no dedicated hydraulic reservoir; it runs off the host carrier's hydraulic system through the auxiliary hydraulic circuit, so fill volume and oil condition follow the carrier machine's own hydraulic tank capacity | Match the host carrier's specified hydraulic oil (typically Cat TDTO, Cat HYDO Advanced, or Cat BIO HYDO depending on the carrier), with viscosity grade selected per the carrier OMM for ambient temperature; no separate spec is issued for the attachment itself |
| Axles/differentials | Not applicable — no axles or differentials on this attachment | N/A |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar BH150 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the BH150 beyond the schedule
Predictive Maintenance & Fluid Analysis
The BH150 has no reservoir or filter of its own, so predictive care means tracking wear trends rather than fluid trends. Log pin-to-bushing clearance at the boom, stick, and bucket pivots at every interval and watch for accelerating wear rates. Because the attachment runs off the host 216-299 series carrier's hydraulic system, route oil sampling and analysis through the carrier, not the backhoe. On GGK units, watch auxiliary-circuit return temperature and flow for early signs of cylinder bypass or coupler wear before a hammer or auger loses performance.
Corrective & Common Repairs
Most BH150 downtime traces to worn boom, stick, or bucket pivot pins and bushings after grease intervals slip during trenching or demolition duty. Replace pins and bushings as matched sets to hold joint clearance rather than one-off. Rod seal weeping at the boom, stick, or bucket cylinder gland calls for a reseal before the rod chrome scores. Check the subframe gussets and quick-attach mounting plate for stress cracks, a common failure point from prying and side-load work.
Overhaul & Rebuild Points
At high-hour thresholds, plan a full rebuild of every pinned joint together: boom-to-subframe, stick-to-boom, and bucket linkage pins, bushings, and thrust washers as one job rather than piecemeal repair. Pull the boom, stick, and bucket cylinders for reseal once rod drift or bypass shows up as slower cycle times. Inspect the subframe and quick-attach mounting casting closely at rebuild; leverage loads from digging and demolition concentrate fatigue cracks at weld toes and mounting bosses.
Seasonal & Environment Servicing
Below freezing, switch to an arctic-grade extreme-pressure grease alternative; standard NLGI 2 moly grease stiffens and stops migrating into pin clearances in cold weather. Cycle the boom, stick, and bucket cylinders fully at cold startup to work grease back into the seals before loading the attachment. In wet, corrosive, or coastal environments, keep pin ends, cylinder rods, and the quick-attach mounting plate cleaned and coated between shifts to slow rust on unpainted wear surfaces.
BH150 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E878 (2) | High hydraulic oil temperature warning | Carrier hydraulic system running hot under sustained backhoe load, low oil level, or a restricted hydraulic oil cooler | Reduce load and let the machine idle to cool; check carrier hydraulic oil level and clean the hydraulic oil cooler |
| E878 (3) | High hydraulic oil temperature, most severe level; hydraulic indicator turns red with audible alert | Continued operation past the warning threshold, cooling system blocked, or oil badly degraded | Stop work immediately and let the carrier cool down before resuming; inspect oil level and cooler once cooled |
| 600-03 / 600-04 | Hydraulic oil temperature sensor circuit reading outside its valid voltage range | Open or shorted wiring at the carrier's hydraulic oil temperature sensor, or a failed sensor | Inspect the sensor connector and harness for damage or corrosion; test sensor resistance against spec |
| E235 | Low hydraulic oil level | Carrier hydraulic reservoir below minimum, often from a leak in the aux circuit feeding the backhoe or simply needing a top-off | Check carrier hydraulic oil level with the backhoe stowed and cylinders retracted; top up and inspect hoses/fittings for leaks |
| 433-00 / 433-01 | Hydraulic oil filter differential pressure switch reading outside normal range, indicating filter restriction | Clogged return or case-drain hydraulic filter on the carrier | Replace the carrier's hydraulic filter and reset if the monitor requires it |
| 1180-05 / 1180-06 | Auxiliary hydraulic control solenoid #1 circuit current below/above normal | Open or shorted wiring, or a failed solenoid coil in the aux hydraulic valve section that supplies the backhoe's boom/swing/stick/bucket functions | Check the aux hydraulic solenoid connector and wiring harness for damage; test coil resistance |
| 1182-05 / 1182-06 | High-flow auxiliary hydraulic solenoid circuit current below/above normal | Wiring or solenoid fault in the high-flow aux circuit, relevant if the backhoe's flow needs exceed base auxiliary flow | Inspect the high-flow solenoid and its wiring; verify the carrier's high-flow option is engaging correctly |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
BH150 attachments & work tools
Digging buckets
Pin-on digging buckets from 260 mm (10 in) up to 700 mm (28 in) wide cover trenching and footing work in this class. A 1200 mm (47 in) grading bucket is offered for backfill and slope cleanup.
Heavy-duty buckets
Reinforced heavy-duty buckets run 300 mm (12 in) to 914 mm (36 in) wide for harder digging conditions than the standard digging line. Sizing overlaps the standard bucket range but adds thicker wear plates and reinforced sidewalls.
Ditch-cleaning buckets
Wide ditch-cleaning buckets in 1000-1400 mm (40-55 in) widths are offered for grading and cleanout passes, and are among the tools run off the optional auxiliary hydraulic circuit at the stick end.
Augers
A14B (direct-drive, light-to-moderate duty) and A19B (planetary-drive, moderate-to-heavy duty) augers mount at the dipper stick and cover bit diameters from roughly 152 mm (6 in) to 762 mm (30 in), with the A19B extending to 914 mm (36 in). Both require the optional auxiliary hydraulic line kit routed to the stick end.
Hydraulic hammers/breakers
Concrete demolition work uses mini-excavator-class hammers in the H45-H65 range (roughly 250-390 kg / 550-860 lb tool weight), matched to this backhoe's stick capacity. A hammer requires the auxiliary hydraulic line option; it is not usable on a machine without that circuit.
Hydraulic thumb
An optional hydraulic thumb kit mounts at the bucket pivot for handling debris and rock, and draws from the same auxiliary hydraulic circuit used by hammers and augers.
Vibratory plate compactor
A stick-mounted vibratory plate compactor (light compact-carrier class, similar to the CVP16 line) is offered for trench backfill compaction and runs off the auxiliary hydraulic circuit.
Auxiliary hydraulic kit / arrangement
Buckets run directly off the backhoe's own circuit and need no extra plumbing. Hammers, augers, thumbs, and compactors all require the optional auxiliary hydraulic line kit that extends flow to the end of the dipper stick; without it those tools cannot be run.
Coupler and mounting
Buckets pin on directly at the stick end; there is no quick-coupler plate documented for this class, tool changes are pin-and-retainer. The backhoe unit itself has a manual side-shift frame (roughly 800 mm / 32 in of travel) and in-cab controls, letting the operator swing and position it without leaving the seat.
Swing and digging geometry
180 degree swing arc and about 192 degrees of bucket rotation, with a bucket breakout force near 3241 kg (7146 lb) and maximum digging depth around 3074 mm (121 in). These govern which bucket/tool combination is practical for a given trench depth and material.
Host machine range
Factory-fitted to Cat skid steer loaders, multi-terrain loaders, and compact track loaders in the 216-299 size classes (e.g. 226 through 299D/299D2 series). Attachment/work-tool selections above assume mounting within this host range; larger or smaller carriers change the practical bucket and hammer sizing.
All BH150 assemblies by section
Every catalogued assembly group for the Caterpillar BH150. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
238-0331 Console Gp-Operator
| 16***95 | Knob | 1 |
| 17***11 | Locknut; (M16x2-Thd) | 2 |
| 23***31 | Console Group-Operator | 1 |
238-0310 Frame Gp-Backhoe
| 17***25 | Ring-Retaining | 8 |
| 23***10 | Frame Group-Backhoe | 1 |
| 23***11 | Frame As | 1 |
255-5491 Frame Gp-Backhoe
| 17***25 | Ring-Retaining | 8 |
| 23***18 | Pad Group-Stabilizer | 2 |
| 23***28 | Cylinder Group-Stabilizer | 2 |
238-0320 Frame Gp-Sliding
| 09***45 | Seal-O-Ring | 4 |
| 09***93 | Dowel | 2 |
| 21***85 | Pad As | 2 |
238-0304 Frame Gp-Swing
| 23***04 | Frame Group-Swing | 1 |
| 23***44 | Frame As-Swing | 1 |
| 23***54 | Pin As | 2 |
211-2082 Guard & Mtg Gp-Cab
| 21***82 | Guard & Mtg Group-Cab | 1 |
| 8T***21 | Washer-Hard; (11x21x2.5-mm Thk)(M10x1.50x30mm) | 4 |
| 8T***33 | Nut (M10x1.50 Thd) | 4 |
238-0318 Pad Gp-Stabilizer
| 23***18 | Pad Group-Stabilizer | 1 |
| 23***19 | Foot As | 1 |
| 26***23 | Plate | 2 |
Hydraulic System
273-0053 Control Gp-Hydraulic Hand
| 12***01 | Knob; (Auxiliary) | 2 |
| 16***95 | Knob | 2 |
| 27***50 | Rod | 2 |
273-0052 Control Gp-Hydraulic Hand
| 12***01 | Knob; (Auxiliary) | 3 |
| 16***95 | Knob | 2 |
| 27***50 | Rod | 2 |
238-0341 Cylinder Gp-Boom
| 10***82 | Washer; (11x19.5x2.5-mm Thk) | 1 |
| 23***41 | Cylinder Group-Boom | 1 |
| 26***01 | Kit-Seal; (Boom Cylinder) | 1 |
238-0343 Cylinder Gp-Bucket
| 23***43 | Cylinder Group-Bucket | 1 |
| 26***03 | Kit-Seal; (Bucket Cylinder) | 1 |
| 3B***89 | Fitting-Grease; (Fan And Alternator Drive) | 1 |
238-0328 Cylinder Gp-Stabilizer
| 23***28 | Cylinder Group-Stabilizer | 1 |
| 26***41 | Kit-Seal; (Stabilizer Cylinder) | 1 |
| 6B***82 | Nut Cylinder Block To Head Assembly | 1 |
238-0342 Cylinder Gp-Stick
| 23***42 | Cylinder Group-Stick | 1 |
| 26***02 | Kit-Seal; (Stick Cylinder) | 1 |
| 3B***89 | Fitting-Grease; (Fan And Alternator Drive) | 2 |
238-0329 Cylinder Gp-Swing
| 23***29 | Cylinder Group-Swing | 1 |
| 26***40 | Kit-Seal; (Swing Cylinder) | 1 |
| 27***34 | Bearing-Sleeve | 1 |
246-0192 Cylinder Gp-Tilt
| 16***86 | Seal As-Buffer | 1 |
| 16***94 | Seal-U-Cup | 1 |
| 1H***39 | Packing,Preformed Cover Part Of Kit P/N 4j***80 | 1 |
258-7686 Kit-Fastener
| 25***86 | Kit-Fastener | 1 |
258-7688 Kit-Joystick Control
| 17***36 | Nut-Hex Flange; (M8x1.25-Thd)(M8x1.25) | 3 |
| 19***99 | Nut; (M8x6.5-mm) | 1 |
| 25***88 | Kit-Joystick Control | 1 |
258-7687 Kit-Lever
| 25***87 | Kit-Lever | 1 |
258-7690 Kit-Seal -Control Valve
| 25***90 | Kit-Seal; -Control Valve | 1 |
| 8F***69 | Packing,Preformed Uoc:Bsv,Bsx | 2 |
| 8U***81 | Seal-O-Ring | 4 |
258-7680 Lines Gp-Backhoe
| 11***83 | Connector | 1 |
| 14***16 | Connector Group | 2 |
| 14***19 | Connector As | 3 |
255-5482 Lines Gp-Backhoe
| 11***83 | Connector | 1 |
| 14***15 | Connector As | 5 |
| 14***16 | Connector Group | 2 |
258-7670 Lines Gp-Backhoe
| 11***83 | Connector | 1 |
| 14***15 | Connector As | 5 |
| 14***16 | Connector Group | 2 |
255-5483 Lines Gp-Backhoe -Without Auxiliary
| 11***83 | Connector | 1 |
| 14***16 | Connector Group | 2 |
| 14***19 | Connector As | 3 |
250-0178 Lines Gp-Boom
| 14***74 | Elbow As | 1 |
| 14***57 | Union Bulkhead; (Orfs) | 1 |
| 15***48 | Elbow As | 2 |
250-0182 Lines Gp-Boom
| 14***74 | Elbow As | 1 |
| 14***57 | Union Bulkhead; (Orfs) | 1 |
| 15***48 | Elbow As | 2 |
252-6793 Lines Gp-Bucket Cylinder
| 14***25 | Connector | 1 |
| 15***41 | Block | 1 |
| 15***94 | Coupler As-Quick Disconnect; (Female)(Quick Disconnect) | 1 |
258-7681 Manifold Gp-Control -Inlet
| 09***51 | Seal-O-Ring (Id=14.00mm) | 1 |
| 25***81 | Manifold Group-Control; -Inlet | 1 |
| 29***95 | Valve-Manual | 1 |
222-3779 Manifold Gp-Control
| 03***21 | Ring-Back-Up | 1 |
| 1H***23 | Packing,Preformed Part Of Kit P/N 5r***25 | 1 |
| 22***79 | Manifold Group-Control | 1 |
253-1483 Valve Gp-Bank 7 -Without Auxiliary
| 25***83 | Valve Group-Bank 7; -Without Auxiliary | 1 |
| 25***81 | Manifold Group-Control; -Inlet | 1 |
| 25***83 | Valve Group-Control; -Boom | 1 |
238-0332 Valve Gp-Bank 7
| 23***32 | Valve Group-Bank 7 | 1 |
| 25***81 | Manifold Group-Control; -Inlet | 1 |
| 25***82 | Valve Group-Control; -Auxiliary | 1 |
258-7691 Valve Gp-Control -Swing
| 25***91 | Valve Group-Control; -Swing | 1 |
| 29***02 | Valve Group-Relief | 2 |
| 29***04 | Kit-Cover | 1 |
258-7692 Valve Gp-Control -Bucket
| 25***92 | Valve Group-Control; -Bucket | 1 |
| 29***00 | Valve Group-Relief; (Thumb Close) | 2 |
| 29***04 | Kit-Cover | 1 |
258-7682 Valve Gp-Control -Auxiliary
| 25***82 | Valve Group-Control; -Auxiliary | 1 |
| 29***00 | Valve Group-Relief; (Thumb Close) | 1 |
| 29***01 | Valve Group-Relief; (Thumb Open) | 1 |
258-7684 Valve Gp-Control -Stabilizer
| 25***84 | Valve Group-Control; -Stabilizer | 1 |
| 29***04 | Kit-Cover | 1 |
| 29***05 | Valve-Check | 1 |
258-7689 Valve Gp-Control -Stick
| 25***89 | Valve Group-Control; -Stick | 1 |
| 29***98 | Valve Group-Relief; (Stick Out) | 1 |
| 29***99 | Valve Group-Relief; (Stick In) | 1 |
258-7696 Valve Gp-Control -Auxiliary
| 25***96 | Valve Group-Control; -Auxiliary | 1 |
| 29***97 | Plug | 2 |
| 29***04 | Kit-Cover | 1 |
258-7683 Valve Gp-Control -Boom
| 25***83 | Valve Group-Control; -Boom | 1 |
| 29***98 | Valve Group-Relief; (Stick Out) | 1 |
| 29***03 | Valve Group-Relief; (Boom Down) | 1 |
Service Equipment And Supplies
250-0180 Plate & Film Gp -Bh160
| 22***42 | Film-Warning; (Crush Hazard, Stay Back, U.S.) | 2 |
| 22***69 | Film-Warning; (Do Not Operate, Read Omm) | 1 |
| 24***45 | Film-Information; (Lift Eye, Tie-Down Location) | 2 |
250-0181 Plate & Film Gp -Bh150
| 22***42 | Film-Warning; (Crush Hazard, Stay Back, U.S.) | 2 |
| 22***69 | Film-Warning; (Do Not Operate, Read Omm) | 1 |
| 24***45 | Film-Information; (Lift Eye, Tie-Down Location) | 2 |
Work Tool Arrangement
253-1480 Backhoe Ar -Bh160, Without Auxiliary
| 16***89 | Tack-Fastener | 4 |
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
253-1482 Backhoe Ar -Bh150, Without Auxiliary
| 16***89 | Tack-Fastener | 4 |
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
238-0330 Backhoe Ar -Bh160, With Auxiliary
| 15***15 | Plate-Identification | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***04 | Frame Group-Swing | 1 |
304-9900 Backhoe Ar -(With Auxiliary)
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
| 23***10 | Frame Group-Backhoe | 1 |
304-9903 Backhoe Ar
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
| 23***20 | Frame Group-Sliding | 1 |
304-9901 Backhoe Ar
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
| 23***10 | Frame Group-Backhoe | 1 |
253-1481 Backhoe Ar -Bh150, With Auxiliary
| 15***15 | Plate-Identification | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***04 | Frame Group-Swing | 1 |
304-9902 Backhoe Ar
| 23***04 | Frame Group-Swing | 1 |
| 23***05 | Stick Group-Hoe | 1 |
| 23***20 | Frame Group-Sliding | 1 |
Work Tools
238-0340 Boom Gp
| 23***40 | Boom Group | 1 |
| 23***41 | Cylinder Group-Boom | 1 |
| 23***42 | Cylinder Group-Stick | 1 |
279-4325 Bucket Ar-Tiltable
| 16***89 | Tack-Fastener | 4 |
| 24***76 | Pin As | 1 |
| 24***87 | Pin | 1 |
279-4323 Bucket As-Ditch Cleaning
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 27***23 | Bucket As-Ditch Cleaning | 1 |
279-4322 Bucket As-Ditch Cleaning
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 27***22 | Bucket As-Ditch Cleaning | 1 |
282-9315 Bucket As-Ditch Cleaning
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 28***15 | Bucket As-Ditch Cleaning | 1 |
279-4321 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 15***81 | Tooth Group-Uni | 4 |
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
279-4313 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 15***81 | Tooth Group-Uni | 4 |
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
279-4312 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 15***81 | Tooth Group-Uni | 3 |
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
252-2600 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 5 |
255-3392 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 4 |
255-3398 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 3 |
252-2623 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 5 |
252-2616 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 5 |
255-3405 Bucket Gp-General Purpose
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 23***00 | Pin | 3 |
281-3824 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 14***63 | Screw-Flat Head; (M16x2x65-mm) | 1 |
| 15***81 | Tooth Group-Uni | 3 |
279-4320 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 15***81 | Tooth Group-Uni | 3 |
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
281-1551 Bucket Gp-General Purpose
| 13***90 | Tooth-Uni | 1 |
| 15***81 | Tooth Group-Uni | 4 |
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
303-1328 Bucket Gp-Hoe
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 1U***02 | Tip-Penetration; (Long) | 1 |
303-1325 Bucket Gp-Hoe
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 1U***02 | Tip-Penetration; (Long) | 1 |
303-1327 Bucket Gp-Hoe
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 1U***02 | Tip-Penetration; (Long) | 1 |
303-1326 Bucket Gp-Hoe
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 1U***02 | Tip-Penetration; (Long) | 1 |
303-1329 Bucket Gp-Hoe
| 15***04 | Plate-Instruction; (Bucket Specifications) | 1 |
| 16***89 | Tack-Fastener | 4 |
| 1U***02 | Tip-Penetration; (Long) | 1 |
222-3780 Compactor Gp-Vibratory
| 0S***29 | Bolt (1" Long) | 8 |
| 19***36 | Seal; (85.6mm Od) | 1 |
| 1J***76 | Seal-O-Ring; (202.79mm Id) | 1 |
240-4078 Coupler Gp-Quick
| 09***28 | Fitting-Grease | 1 |
| 09***37 | Pin; (Spring) | 2 |
| 24***63 | Pin-Coupling | 1 |
240-4077 Coupler Gp-Quick
| 17***48 | Pin | 2 |
| 24***77 | Coupler Group-Quick | 1 |
| 24***78 | Coupler Group-Quick | 1 |
304-9905 Mounting Gp-Backhoe
| 25***17 | Step As; (Lh) | 1 |
| 25***21 | Step As; (Rh) | 1 |
| 30***05 | Mounting Group-Backhoe | 1 |
258-3639 Mounting Gp-Backhoe -Kit
| 17***07 | Lock Pin | 8 |
| 25***30 | Step As | 1 |
| 25***39 | Mounting Group-Backhoe; -Kit | 1 |
304-9904 Mounting Gp-Backhoe
| 25***97 | Step As; (Lh) | 1 |
| 25***84 | Step As; (Rh) | 1 |
| 30***04 | Mounting Group-Backhoe | 1 |
238-0305 Stick Gp-Hoe
| 09***68 | Pin-Cotter | 4 |
| 15***38 | Mounting Group-Bucket | 1 |
| 23***96 | Pin As | 2 |
282-1712 Tilt Gp -Bucket
| 24***75 | Bearing | 2 |
| 28***12 | Tilt Group; (Bucket) | 1 |
| 28***13 | Bracket As-Mounting | 1 |
BH150 serial number reference
The PIN/serial plate on the BH150 is riveted to the backhoe main frame near the swing-bracket/mounting area where the unit pins to the carrier, not on the loader itself. Read it as an 8-character legacy-style serial: a 3-letter model prefix followed by a sequential number (e.g. GGK00345); newer stampings show the full 17-character PIN with the same 3-letter block embedded near the start.
| Prefix | Identifies | Notes |
|---|---|---|
| GGK | BH150 skid steer/multi-terrain/compact track loader backhoe attachment, configuration WITH auxiliary hydraulics (stick-end aux flow for hammers, augers, thumbs) | GGK1-UP: backhoe arrangement with auxiliary hydraulics, per the factory parts catalog. |
| KEP | BH150 skid steer/multi-terrain/compact track loader backhoe attachment, configuration WITHOUT auxiliary hydraulics | KEP1-UP: backhoe arrangement without auxiliary hydraulics, per the factory parts catalog and a separate service manual. |
Frequently asked questions
What powers the Cat BH150 backhoe attachment?
Nothing on the attachment itself. The BH150 has no engine, ECM, or hydraulic reservoir of its own; it runs entirely off the hydraulic system of its host Cat 216-299 series skid steer, compact track, or multi-terrain loader, drawing carrier supply pressure up to roughly 235 bar (3,400 psi).
What is the Cat BH150's operating weight?
The BH150 weighs approximately 1,023 kg (2,256 lb) as mounted. Actual weight varies slightly by configuration, GGK auxiliary-hydraulics units versus standard KEP bucket-only units, and by which bucket or work tool is fitted.
What replaced the Cat BH150 backhoe attachment?
Nothing has superseded it. The BH150 remains part of Caterpillar's current backhoe-attachment lineup for skid steer and track loaders. The BH160 is a related, larger-capacity sibling for bigger carriers, not a replacement for the BH150.
What BH150 owners discuss
Why does the boom or stick creep down after the backhoe is parked mid-cycle?
What wear pattern shows up at the boom-stick-bucket pivots?
Can any BH150 run a hammer or auger off its own auxiliary circuit?
Does the BH150 have an engine or power quirks like a powered machine?
What electrical or sensor issues come up with this attachment?
Which ground-contact parts wear fastest and need routine attention?
What should I check before buying a used BH150?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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