195-3577 fan pump For Caterpillar CAT950G/962G wheel loaders

195-3577 fan pump For Caterpillar CAT950G/962G wheel loaders Featured Image
  • 195-3577 fan pump For Caterpillar CAT950G/962G wheel loaders

Short Description:

195-3577 is a variable displacement hydraulic fan pump developed for Caterpillar CAT950G and CAT962G medium wheel loaders

Product Detail

Product Tags

description

This variable piston fan pump integrates a built-in pressure and flow control valve block, which can automatically adjust displacement and reduce unnecessary flow output when the system temperature is low. The cylinder block, pistons, slippers and valve plate are manufactured with high-precision surface treatment, maintaining stable volumetric efficiency under frequent load fluctuations caused by bucket lifting, dumping and material stacking cycles. The thick cast iron pump body is reinforced to resist heavy vibration and impact from uneven ground, sand, gravel and dust in material yards. It is fitted with high-performance oil-resistant sealing groups, able to withstand long-duration pressure cycling and wide temperature swings, effectively preventing oil leakage at shaft seal and mating surfaces. All finished pumps go through strict bench testing including flow curve detection, pressure holding test and leakage inspection before shipment. The mounting flange, spline shaft and oil port layout fully match the original equipment, enabling direct replacement without modification to engine brackets or piping.

product parameters

Part No：195-3577
Interchangeable Part No：168-7873
Product Type：Variable Piston Hydraulic Fan Pump
Applicable Equipment：Caterpillar 950G / 962G Medium Wheel Loader
Core Technology：Built-in load responsive variable control
Pump Displacement：24 cc/rev
Rated Working Pressure：23 MPa
Max Instantaneous Peak Pressure：27.5 MPa
Rated Speed：1800 rpm
Max Allowable Speed：2350 rpm
Min Idle Speed：500 rpm
Volumetric Efficiency：≥93.5%
Applicable Altitude：≤3000m
Sealing Type：High performance reinforced oil-resistant composite seal
Internal Leakage Standard：≤1.45 L/min (rated pressure)
Main Material：Reinforced cast iron pump housing, hardened piston & slipper, alloy valve plate
Installation Method：Flange mounting, spline drive shaft
Application：Hydraulic power source for wheel loader cooling fan system

Applicable Models

This hydraulic fan pump is aftermarket replacement spare part:
・Caterpillar 950G Wheel Loader
・Caterpillar 962G Wheel Loader
Note：Interchangeable with part number 168-7873. Verify machine serial number before placing orders to avoid mismatching.

Application Scenarios

This fan pump is tailored for medium wheel loader bulk material handling work:
・Quarry operation：Rock loading, stockpile sorting and haul truck feeding under dusty high-temperature environment.
・Port and terminal：Sand, gravel and bulk cargo loading, continuous round-the-clock shift operation.
・Construction aggregate yard：Material stacking, reclaiming and site cleanup with frequent bucket cycles.
・Highway project：Aggregate loading and temporary yard management during road base construction.
・Waste transfer station：Waste material pushing, sorting and loading with heavy intermittent duty cycles.

advantage

・Built-in load responsive variable valve adjusts pump displacement automatically based on cooling demand, reduces power consumption and fuel waste during light-load material handling, suitable for long-shift loading work.
・Hardened piston, slipper and alloy valve plate combination delivers outstanding wear resistance, coping with dust-contaminated hydraulic oil in material yards and extending service life under repeated loading cycles.
・Reinforced thick cast iron pump housing can absorb strong vibration from bucket impact and uneven ground, protecting internal hydraulic components from mechanical damage.
・High-performance oil-resistant composite seals maintain stable sealing performance under continuous pressure cycling, lowering shaft-end oil seepage risk even with frequent start-stop operation.
・Compatible with 168-7873, flexible spare part selection, helping parts dealers and on-site service teams simplify inventory planning.
・Original-style flange and spline shaft design allows fast field replacement, cutting machine downtime and minimizing disruption to bulk material loading schedules.

FAQ 

Q1: Which loader does 195-3577 fan pump fit?
A1: It is designed for Caterpillar 950G and 962G wheel loaders, interchangeable with 168-7873. Confirm machine serial number before purchase to avoid wrong part selection.

Q2: What abnormal symptoms indicate the fan pump needs replacement?
A2: Fan cannot speed up as engine temperature rises, pump body oil seepage, heavy-load rattling noise, and engine overheating during continuous bulk loading work. Gradual worsening of these signs usually means internal component wear.

Q3: What preparation work is needed before fan pump installation?
A3: Release residual hydraulic pressure, flush the hydraulic tank and pipelines, inspect hydraulic oil cleanliness and filter status. After assembly, bleed air from hydraulic circuit and test fan speed regulation function under no-load.

Q4: The loader still overheats after fan pump replacement, what items should be inspected?
A4: Check radiator clogging, hydraulic oil grade, control valve function, fan blade deformation, water pump and full engine cooling circuit. Overheating fault may not only be caused by fan pump damage, complete cooling system inspection is required.

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