312D or 313D pump pressure hunting or failing to cut back under load? A worn 282-9155 pump regulator loses servo spool accuracy, causing the pump to over-deliver or under-deliver relative to the load demand - stalling the engine or leaving the 312D operating at partial hydraulic capacity. RITO supplies this Handok-grade regulator assembly to restore precise swashplate control on your Cat 312D or 313D.
Item NO.:
282-9155Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock282-9155 Pump Regulator Assembly for Caterpillar 312D, 313D, 312DL and 313D2 excavators. Cross-references: 2829155, 173-1168, 180-4985. This regulator governs swashplate angle on the Cat 312D main pump, balancing hydraulic output against engine torque availability. Precision servo spool, calibrated spring pack and sealed regulator body maintain the stable P-Q curve that prevents engine stall and maximises 312D fuel efficiency.
| Part Number | 282-9155 / 2829155 |
|---|---|
| Part Name | Pump Regulator Assembly |
| Compatible Brand | Handok (Caterpillar 312D / 313D) |
| Applicable Models | 312D, 313D, 312DL, 313D2 Excavator |
| Application | Swashplate angle control servo regulator for Cat 312D / 313D main hydraulic pump |
| Material | Precision-machined alloy steel spool, body and spring assembly |
| Product Color | Metallic industrial finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Controls 312D / 313D pump swashplate angle to match hydraulic output to engine load availability |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Servo spool lapped to bore clearance within 5 micrometres, ensuring fast, stable swashplate response to pressure changes without the hunting or oscillation that reduces 312D fuel efficiency.
Spring pack pre-load calibrated to Cat 312D engine torque curve, preventing the pump from demanding more torque than the engine can deliver without stalling.
Regulator components manufactured to Handok material and dimensional specifications, providing the dimensional stability under cyclic pressure loads that maintains accurate servo spool clearance over service life.
282-9155 cross-references to 173-1168 and 180-4985 across 312D and 313D production variants; confirm the applicable cross-reference for your specific pump serial number range.
FAQ
Q: What symptoms indicate the 282-9155 regulator has failed on my 312D?
A: Engine speed drops under light load (pump over-delivering beyond power limit), main relief chatters continuously at no-load condition (pressure hunting), or all functions are slow regardless of engine speed (pump under-delivering due to servo stuck at low displacement).
Q: Can I adjust the 282-9155 regulator spring in the field?
A: Spring adjustment requires a calibrated test bench. Field adjustment without correct equipment shifts the power-limit curve, risking engine overload or severe pump under-performance. Replace the regulator assembly as a unit rather than attempting field spring adjustment.
Q: Is 282-9155 the same regulator as 173-1168 on 313D?
A: 173-1168 is a cross-reference for the 282-9155 regulator application. Verify the pump serial number range to confirm which part number applies to your specific 312D or 313D pump configuration.
Q: How to confirm 282-9155 is the correct regulator for my 312D?
A: Match existing regulator part number 282-9155 or cross-reference 173-1168 / 180-4985. Confirm pump and machine model are 312D or 313D. Provide pump serial number for cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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