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{"title":"Komatsu PC300-8MO 350-8MO Excavator Spare Parts 708-2G-00180 708-2G-01181 708-2G","imgUrl":"https:\/\/img.chinax.com\/nimg\/40\/2d\/187aa2c57cb7c0632e420d3c1437-200x200-1\/komatsu_pc300_8mo_350_8mo_excavator_spare_parts_708_2g_00180_708_2g_01181_708_2g_04740_main_piston_pump.jpg","attrs":{"Packaging Details":"Wooden Case \/ Carton with Foam Protection, or as Required","Payment Terms":"T\/T","MOQ":"1 Set","Price":"Negotiable"}}
{"title":"Hydraulic Main Piston Pump 708-2G-00024 708-2G-00022 708-2G-00023 For Komatsu","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/b5\/79dc0aa9388fd985c6a0adc99d96-200x200-1\/hydraulic_main_piston_pump_708_2g_00024_708_2g_00022_708_2g_00023_for_komatsu_pc300_7_pc350_7_pc360_7_excavator_spare_parts.jpg","attrs":{"Payment Terms":"T\/T","Condition":"New \/ Rebuilt","Packaging Details":"Dimension: L60\u00d7W60\u00d7H80 cm","Delivery Time":"3-8 Working Days"}}
{"title":"Hydraulic Main Piston Pump 708-2H-00026 708-2H-00022 708-2H-00450 For Komatsu","imgUrl":"https:\/\/img.chinax.com\/nimg\/cc\/08\/5dc72be9844a08bac6dbf5d9f7e5-200x200-1\/hydraulic_main_piston_pump_708_2h_00026_708_2h_00022_708_2h_00450_for_komatsu_pc400_7_pc450_7_pc400_8_pc450_8_excavator_spare_part.jpg","attrs":{"Payment Terms":"T\/T","Condition":"New \/ Rebuilt","Transportation Method":"DHL, UPS, FedEx, Sea Freight","Warranty":"6 Months"}}
{"title":"Komatsu PC400-6 PC450-6 PC300-6 PC350-6 Excavator Hydraulic Pump 708-2G-00191","imgUrl":"https:\/\/img.chinax.com\/nimg\/e8\/63\/86d74f88833743132e57b2f71c77-200x200-1\/komatsu_pc400_6_pc450_6_pc300_6_pc350_6_excavator_hydraulic_pump_708_2g_00191_708_2h_00350_708_2h_00130_main_piston_pump.jpg","attrs":{"Delivery Time":"3-8 Working Days","Packaging Details":"Wooden Case \/ Carton with Foam Protection, or as Required","Supply Ability":"300pcs\/day","Minimum Order Quantity":"1 set"}}
The PC30MR-2 is a Komatsu mini crawler excavator. The hydraulic main pump is a main variable displacement piston pump. Common part numbers on the same platform: 708-1S-00260 / 708-1S-00270 / 708-1S-00254 (common to PC30MR-2 / PC27MR-2), plus a separate pilot gear pump.
Common Faults
Weak movement / slow operation: Internal leakage from worn main pump pistons/valve plate/slippers, reduced volumetric efficiency; insufficient pilot pump pressure causing abnormal displacement control.
Pump abnormal noise / squealing: Insufficient suction or air ingress, contaminated oil, internal pump wear.
Engine lugging / speed drop under load: Seized regulator/power control spool; pump stays at large displacement and absorbs excessive power.
High oil temperature: Severe main pump internal leakage, high-pressure oil converting to heat.
Oil leakage: Aged main shaft oil seal, worn end-cover O-rings; poor case drain causing excessive case pressure.
Jitter / pressure fluctuation: Air in the system, seized regulator, scored valve plate.
Purchasing Recommendations
Confirm the sub-model: PC30MR-2 / PC27MR-2 (-2 platform), and whether a pilot pump configuration is included.
Confirm main pump vs pilot pump: the 708-1S series is the main piston pump; the pilot gear pump is priced separately.
Verify part number application: 708-1S-00260 / 00270 / 00254 — confirm each unit's displacement/model application.
Confirm condition: new genuine / remanufactured / compatible (aftermarket) part.
For overhaul parts: cylinder block, valve plate, piston (slipper), retainer plate, swashplate, main shaft, bearings, seal kit.
After-sales: warranty of 6–12 months; fill with hydraulic oil before starting; after repair, replace filters and clean the oil tank.
Technical Illustrations
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Trading Company,Manufacturer
Year Established:
2017
Total Annual:
$1 Million -US$5 Million
Employee Number:
80~100
Ecer Certification：
Verified Supplier
Guangzhou Kawo Construction Machinery Co., Ltd.
Company Profile
Professional Excavator Hydraulic Products Manufacturer & Service Provider
Founded in 2017, Guangzhou Kawo Construction Machinery Co., Ltd. is a professional manufacturer and service provider specializing in excavator hydraulic produ... Guangzhou Kawo Construction Machinery Co., Ltd.
Company Profile
Professional Excavator Hydraulic Products Manufacturer & Service Provider
Founded in 2017, Guangzhou Kawo Construction Machinery Co., Ltd. is a professional manufacturer and service provider specializing in excavator hydraulic produ...
