توضیحات
Our incoming parts sheet listed this item as 165-6767 plus 0R-7949, as though two pumps were involved. They are not. 0R-7949 is the Caterpillar remanufactured exchange reference for the same pump, and the pair is one part number for a new unit and one for the exchange unit.
What the catalogue says
Cat lists 165-6767 as PUMP GP-2PS, and the parts book records PUMP GROUP-PISTON on the D350E II inside the group named for steering and brake. The 2PS suffix is Cat’s way of saying two piston sections: one tandem body doing double duty on two circuits, which is why a fault on this pump can show up as heavy steering, weak brake accumulation, or both.
适用性
CAT D350E Series II from prefix 2XW 00001, D400E Series II at 8PS 00001, and the D400E Series II ejector truck at APF 00001, all on the Cat 3406E engine. The current-generation D350 and D400 are different machines on different engines with different pump groups, so do not carry this number across generations.
What not to cross
Supplier listings bundle 165-6767 with 161-6742, 167-0994 and 167-1153. 167-0994 is a steering piston pump for other machines and the others are separate items; none is a substitute. One Chinese price sheet also prints this number inside a fan drive table, which is where the fan idea came from, and it is wrong: the articulated truck fan circuit on these models is fed from the steering and brake gear pump group, not from this piston pump.
故障迹象
- Steering heavy at idle that improves with engine rpm: the steering section is losing flow.
- Brake accumulation pressure dropping and the warning lamp coming on under load: test the brake section output before replacing accumulators.
- Noise from the pump bay: cavitation. Check the suction line and tank filter.
- 轴封处有油：先查壳体泄油背压，再查联轴器。.
The compensator tests are in our 调节器诊断与调整指南, and the comparison method in the 泵采购与规格指南.
安装与订购
Match shaft spline, pilot, flange, both port blocks and rotation against the removed pump, and note which section feeds which line before disconnecting anything. Prime the casing with clean oil before cranking. Change the return filter element and clear the suction strainer, targeting ISO 4406 18/16/13. Keep the case drain unrestricted to tank. On a truck with a brake circuit involved, confirm accumulator charge and warning-lamp behaviour before it returns to the haul road.
最小起订量一件。新售后市场产品按形式发票所述提供三至六个月保修。木箱封箱前经过台架测试并对照您的订单拍照，付款后5至8个工作日发货，视库存而定。该系列隶属于 CAT液压泵.
