CG958G Wheel Loader. Manual - part 31

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transmission box due to insufficient performance of materials and inconformity of 

friction materials with the friction requirements. 

 Mixture of oil of various levels shall not be used for the transmission box. The oil 

mixture of various levels uses high moleclar polymer as improver of viscosity 

index. Because of permanent and temporary shear, the improver of viscosity index 

loses its viscosity efficiency. 

 The oil for transmission box and transmission system cannot be used for the 

engine, or not the service life of engine shall be shortened. 

 This machine adopts Mobil Delvac Super (the level is SAE15W-40). 

6.4 Differential Gear and Final Transmission Fluid 

 In order to attain optimal service life and performance of the parts of the front and 

rear axles, the oil of proper viscosity shall be chosen. The differential gear and 

final transmission fluid recommended by the SICHUAN CHENGDU 

CHENGGONG CONSTRUCTION MACHINERY CO., LTD. is the one in 

conformity with the API GL-5 code. 

 This machine adopts Mobilube GX

 HD80W-90

. 

6.5 Grease 

There are many kinds of grease recommended by the SICHUAN CHENGDU 

CHENGGONG CONSTRUCTION MACHINERY CO., LTD. They are applicable 

different conditions: 

 MPGM 

MPGM is applied to heavy-duty roller bearing and joints. The high-pressure 

grease enables the machine to have its longest service life. Under NLGI NO.2 is 

applicable to the conditions of most kinds of temperature. 

If MPGM grease is not available, the multi-purpose grease containing 3%~5% 

molybdenum may be used. 

 It is recommended to use MPGL (for non-high pressure area). 

The NLGI NO.2 grease is used for automatic light-load high-temperature 

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lubrication (175℃). The grease serves good mechanical stability, anti-oxidation and 

antirust functions, and good separation torque. If this kind of grease is not available, 

the similar multi-purpose grease may be used. 

 This machine adopts molybdenum disulfide lithium-based grease or 3# and 4# 

calcium-based grease. 

6.6 Braking Fluid 

This machine adopts hydraulic braking system and does not require the braking 

fluid separately. The liquid for the braking system is same as the one for the hydraulic 

system. 

All kinds of operation oil shall be cleanly. The oil for hydraulic system shall 

meet the requirements of NAS9 level. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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VII    Viscosity and Full Capacity of Operation Oil

 

7.1 Viscosity and Temperature Range of Operation Oil 

Specification and No. 

Type 

The brand number added as the 

product that has an export destination 

to a non-low temperature area 

The brand number added as the 

product that has an export 

destination to a low temperature 

area 

Oil for torque converter 

and transmission box 

SAE 15W-40 Mobil Delvac Super 

1300 

  Mobil Delvac MX 15W-40 

Axle lubricant 

HD80W-90(Mobilube HD 80W-90) 

Same as left column 

Hydraulic oil 

Hydraulic oil 

(Mobil DTE 25) 

Hydraulic oil 

(Mobil DTE 15M) 

Common axle 

DOT 3 Mobil Super Heavy Brake 

Fluid 

Same as left column 

Air-pushing oil 

brake 

Hydraulic oil (Mobil Delvac 

Hydraulic 10W) 

Same as left column 

Br

ak

e 

oil 

We

t 

axl

e 

Hydraulic 

brake 

/ / 

Engine oil   

0# light diesel fuel 

-20# light diesel fuel 

Grease 

NLGI 2 lithium-based (Mobilgrease 

HP 222) 

Same as left column 

Engine oil 

SAE 15W-40 Mobil Delvac Super 

1300 

  Mobil Delvac MX 15W-40 

 Anti-icing fluid 

Mobil Antifreeze 

(Clear water 40%+antifreeze 60%) 

Mobil Antifreeze 

(Clear water 20%+antifreeze 80%)

7.2 Full Capacity of System 

Full Capacity (approximation) 

Oil box or system 

Liter   

Cooling system 

33 

Fuel box 

240 

Engine oil 

13-15 

Transmission fluid 

45 

Differential gear and final 

transmission fluid (single unit) 

40 

Hydraulic oil box 

155 

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VIII S.O.S 

S.O.S method is adopted to examine the conditions of the machine and whether 

the machine requires to be maintained. As each kind of oil is sampled, the lubricant 

shall be heated and mixed evenly so as to ensure that the sample oil has 

representativeness. 

8.1 Acquisition of Sample Oil for S.O.S 

In order to realize the good preventive maintenance scheme, we suggest adopting 

the S.O.S method to examine the conditions of the machine and whether the machine 

requires to be maintained. As each kind of oil is sampled, the lubricant shall be heated 

and mixed evenly so as to ensure that the sample oil has representativeness. 

For acquisition of sample oil for S.O.S, several methods are available. 

  Insert sample oil doper into the oil groove. 

  Use sample oil valve. 

  Use discharged oil as the oil is replaced. 

Note: We suggest adopting the first or second method. If two methods do not work, 

the discharge oil may be used. 

As the discharged oil is adopted as the sample oil, the oil cannot be sampled from 

the oil discharged firstly or lastly because it is not mixed evenly and has no 

representativeness. 

8.2 S.O.S (Regular Sample Oil) Analysis 

The regular sample oil analysis is composed of three basic tests: 

  Wear element analysis. 

  Chemical and physical tests. 

  Oil status analysis. 

The wear element analysis adopts spectrophotometric method to examine the 

wear degree of components by measuring the concentration of the wear mental 

elements in the sample oil (unit: number of particles per one million). If the test 

results deviate from the concentration range of normal wear, we may confirm that the 

part will be disabled soon.