CAT Hydraulic Pump
Products
CAT Hydraulic Pump
CAT Hydraulic Pump category features a wide range of hydraulic pumps for Caterpillar excavators and heavy equipment, including main hydraulic pumps, fan pumps, and gear pumps. From axial piston pumps to gear pumps, each unit is engineered to deliver the precise flow and pressure required for CAT machine hydraulic systems.
We supply pumps for popular CAT models including 320D, 336D, 345C, 365C, and many more. Whether you need a complete pump assembly or replacement parts, our products are built to OEM specifications for reliable performance. For related components, see our Hydraulic Fan Motor and Excavator Main Control Valve categories.
Part: 187-9090 brake supply piston pump for CAT 735, 735B, 740 and 740B articulated dump trucks. Caterpillar lists it as an 18Cc Basic Piston Pump, axial piston variable displacement, and the parts book item name is PUMP GP-PISTON -BRAKE in group 152-6961.
It is not a fan motor or a fan pump. Our incoming parts sheet labelled it that way and the label is wrong; the evidence is set out below. Cat reman equivalent 10R-6685.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 9T-6857 piston pump for CAT 416 and 428 backhoe loaders with the 4.236 and T4.236 diesel engines. Caterpillar lists it simply as PUMP and the parts book item name is PUMP GP-PISTON.
Cat reman equivalent: 0R-4218. The circuit is not stated in Cat’s wording, and we say so plainly below rather than repeat a supplier guess.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 6E-3524 external gear pump for CAT 980C, 980F and 980F II wheel loaders and the R1700 II and R1700G underground loaders. The parts book item name is PUMP GROUP-GEAR -IMPLEMENT, TRANSMISSION.
Construction: single-section fixed displacement external gear pump, one section of the 2V-6124 gear pump group.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 122-1206 hydraulic piston pump for CAT telehandlers TH62, TH63, TH82 and TH83. Caterpillar lists it as PUMP-HYD and the parts book item name is PUMP GP-PISTON, member of group 8I-3962 PUMP & MTG GP-HYDRAULIC.
Cat reman equivalent: 0R-0913. Not a fan pump; no Cat reference gives it a fan designation.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 6E-6272 slipper piston pump group for CAT D4H XL and D5M tractors. The parts book records it as PUMP GP-PISTON, annotated SLIPPER, and states it is part of 6E-5965 PUMP GROUP-PISTON (HYDRAULIC).
Read before ordering: 6E-5965 is the parent pump assembly, not a cross-reference. 9T-4104 is the D4H pump and is a different tractor.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 165-6767 two-section piston pump for CAT D350E Series II and D400E Series II articulated dump trucks. Caterpillar lists it as PUMP GP-2PS and the parts book places it in group 159-7885 PUMP & MTG GP-STEERING & BRAKE.
What 2PS means: two piston sections in one tandem body, supplying steering and brake circuits together. Cat reman equivalent 0R-7949.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 6E-3137 piston pump for CAT H-series and K-series motor graders, listed by Caterpillar as Pump Group-Piston with the parts book item name PUMP GP-PISTON. Its plate carries the implement control valves for articulation, centreshift, wheel lean and blade lift.
Role: the implement side of the tandem pump stack. Cat reman equivalent 0R-7672.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 6E-3136 steering piston pump for CAT H-series and K-series motor graders. Caterpillar lists it as a 74Cc Steel Piston Pump and the parts book item name is PUMP GP-PISTON -STEERING, member of group 8X-2379 PUMP & MTG GP-STEERING.
Type: variable displacement axial piston, pressure and flow compensated. Cat reman equivalent 0R-7682.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 9T-8346 implement piston pump for CAT D8N and D8R track-type tractors. Caterpillar lists it as a Hydraulic Piston Pump with the attribute axial piston pump, variable displacement, and the parts book item name is PUMP GP-PISTON (IMPLEMENT), annotated SLIPPER in the catalogue.
Cat reman equivalent: 0R-8503.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 104-1752 implement piston pump for CAT D9R track-type tractors. Caterpillar lists it as an Implement Piston Pump; the parts book item name is PUMP GP-PISTON -IMPLEMENT, member of the 233-5252 implement control group.
Type: variable displacement axial piston pump, pressure and flow compensated, nine-piston rotating group. Cat reman equivalent 0R-7669.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 455-7978 variable displacement piston pump for CAT 427F2, 428F2 and 434F2 backhoe loaders, listed by Caterpillar as a Variable Displacement Piston Pump.
Role: main hydraulic pump for the implement circuits, not a fan pump.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 224-6369 piston pump for CAT 420D, 430D, 432D and 442D backhoe loaders with the Cat 3054 engine, listed by Caterpillar under the item name PUMP GP-PS-B.
Role: main hydraulic pump for the implement circuits, not a fan pump.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 350-0666 hydraulic piston pump for CAT E-series backhoe loaders. Caterpillar lists it as a Hydraulic Piston Pump and the parts book item name is PUMP GP-PISTON, with no fan qualifier.
Role: main implement pump. It supersedes 296-6714 and 247-7867 in Cat’s own literature.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 307-3063 variable displacement axial piston pump for CAT F-series backhoe loaders, underlying unit Bosch Rexroth R986110670, Cat reman reference 20R-6569.
Role: main hydraulic pump for the implement circuits. Earlier supplier data labelled this a fan pump; that label is not supported and has been corrected here.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 161-6634 slipper piston pump for CAT 416C, 426C, 428C, 436C and 438C backhoe loaders with the Cat 3054 engine. Caterpillar lists it as a Slipper Piston Pump, and the underlying unit is a Bosch Rexroth variable displacement axial piston pump.
Role: main hydraulic pump for the implement circuits. It is not a fan pump.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.
Part: 139-6084 external gear pump for CAT 938G, 950G, 962G, IT38G and IT62G loaders with the Cat 3126 engine. Caterpillar lists it under the item name PUMP GP.
What it is not: a fan pump. Cat’s title does not assign it to the cooling circuit, and no parts data we could check puts it there. It is a fixed displacement gear pump in the loader hydraulic system.
Supplied as: new HTD-brand replacement, made in China. MOQ 1 piece, wooden case, dispatch 5 to 8 working days.