CG958G Wheel Loader. Manual - part 20

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1.3.4 Cooling fan control system 

I. Structure and operating principle of cooling fan control system 

1. Diagram of cooling fan control system 

 

 

 

(1). Pump: CBQz-F540-AFΦL, (2). Pressure tap: measures motor inlet pressure, (3). Hydraulic motor: 

WM09A1C310L07TB122HGNNR2320001M, (4). Overflow valve: provided with hydraulic motor, (5). 

Motor support assembly, (6). fluid coupler 

2. CG958G loader adopts an independent cooling system (cooling fan control system) mainly consisting of 

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pump, motor, motor support assembly, coupling flange, fluid coupler, etc., system cleanliness is controlled 

within Grade NAS1683 9. 

Features of cooling fan control system: 

(1). Better cooling effects on hydraulic oil and torque converting oil; 

(2). Cooling effects on hydraulic oil and torque converting oil are not affected even under loaded working 

conditions of the loader. 

System cleanliness is controlled within Grade NAS1683 9. 

II. Pump: CBQz-F532-AFΦL manufactured by Hefei Changyuan Hydraulics Co., Ltd. 

Position of pump: 

 

 

CBQz-F532-AfΦL gear oil pump adopts high strength aluminum alloy for pump casing, and uses many 

advanced technologies such as axial clearance floating compensation, radial equilibrium, DU self-lubrication, 

etc. It features high volumetric efficiency, high pressure, low noise, good vibration resistance and long 

service life. 

1. Type of connection 

Input shaft extension: SAE B DP16/32 T=13 , pressure angle: 30º, shaft extension length: 42; 

Flanged connection: rabbet installed: Φ101.6-0.007, rabbet depth 9; Flange installed: 2-Φ14; center distance: 

146; pump displacement: 32cm

3

/r; 

Oil inlet: bore diameter Φ30 threaded hole 4-M10, depth 15, center distance: 58.7x30.2; 

Oil outlet: bore diameter Φ20 threaded hole 4-M8, depth 15, center distance: 47.6x22.2; 

Center distance between inlet and outlet: 64. 

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2. Cautions on use of gear pump 

1)  Hydraulic oil should be thoroughly filtered at least once every 2-3 months and replaced if 

necessary to ensure cleanliness (hydraulic oil is deteriorated in long-time circulation, and this is 

detectable by observing oil color) for a longer service life of hydraulic components and a higher 

performance of engine. 

2)  It is recommended to idle run the engine for at lease 10 minutes to warm up oil before a loaded 

operation, provided oil intake is in good condition after starting. This helps prevents poor oil intake 

caused by high viscosity from damaging pump plunger. 

IMPORTANT 

 

Dismounting and servicing of gear pump by untrained maintenance staff is strictly prohibited. 

 

CAUTION 

 

When replacing rubber tube assembly in gear pump, loader engine should be shut off first to release 

pressure and cool down hydraulic oil (to a safe degree) before the replacement is made. 

 

Motor: WM09A1C310L07TB122HGNNR2320001M manufactured by Xi’an Head Electric Power 

Equipment Manufacture Co., Ltd. 

Position of motor 

 

 

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1. Type of connection 

Input shaft extension: KEY4X6.5，DIN6888, taper:1:5, nut: M14X1.5, tightening torque: 80+10NM; 

Flanged connection: rabbet installed: Φ80f7, rabbet depth 8; Flange installed: 4-Φ9 center distance: 100x72; 

pump displacement: 31cm

3

/r; 

Oil inlet: G3/4; oil outlet: G1/4, tightening torque between inlet and outlet: 90NM; 

Overflow valve: 16Mpa (adjustable) 

 

2. Engine cooling fan curve 

 

1965 2400

700

0

500

1000

1500

2000

2500

0

500

1000

1500

2000

2500

3000

Diesel engine speed n

D

 [rpm]

Fan speed n

L

 [rpm]

max. diesel engine speed

 

 

3. Cautions on use of motor 

Hydraulic oil should be thoroughly filtered at least once every 2-3 months and replaced if necessary to 

ensure cleanliness (hydraulic oil is deteriorated in long-time circulation, and this is detectable by observing 

oil color) for a longer service life of hydraulic components and a higher performance of engine. 

 

IMPORTANT 

 

Dismounting and servicing of gear pump by untrained maintenance staff is strictly prohibited.