180-6645 hydraulic pump drive shaft for engine spare part

180-6645 hydraulic pump drive shaft for engine spare part Featured Image
  • 180-6645 hydraulic pump drive shaft for engine spare part

Short Description:

CAT 180-6645 hydraulic pump drive shaft with involute splines on both ends, transmits engine power to main hydraulic pump, replacement for hydraulic system overhaul of excavators and loaders.


Product Detail

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description

It is forged from high-tensile alloy steel with quenched and tempered treatment. The spline sections are induction hardened for excellent torsion and impact resistance. As an intermediate power transfer component, it connects the engine drive gear to the hydraulic pump input flange, delivering steady torque to maintain high-pressure oil supply for travel, swing and boom hydraulic circuits. It is widely used on medium and large Cat construction machines for variable-load working conditions in Southeast Asia and Middle East.

Part No.: 180-6645
Name: Hydraulic Pump Drive Shaft
Height (in): 5.0
Length (in): 5.1
Material: Alloy steel, induction hardened spline surfaces
Structure: Solid shaft with involute splines at both ends
Function: Transfer torque to drive main hydraulic pump

Product Advantages

1. Spline module and tooth profile follow OEM specification for uniform meshing clearance and reduced spline wear and slippage noise.
2. Strict coaxiality control minimizes runout at high speed and lowers extra load on pump internal bearings.
3. Integrated heat treatment offers strong resistance to shock torque and prevents twisting or fracture under heavy load.
4. Direct replacement part with no flange modification required, easy installation to cut downtime.

FAQ 

Q: Can I keep using 180-6645 with slightly worn splines?
A: Continued use is not recommended. Spline wear creates impact load and may damage the hydraulic pump input shaft.

Q: Does this drive shaft fit different hydraulic pump models?
A: No. Spline size and overall length are fixed. It only matches the main pump for designated machine models, cross-pump fitment is invalid.

Q: What usually causes drive shaft fracture?
A: Common causes include misalignment, failed damper, or locked pump leading to sudden torque overload.

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