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REDUCTION DIFFERENTIAL: REASSEMBLY

Inspection and Adjustment Side Bearing Preload

Reduction Gear Backlash

Tie a wire on the reduction gear tooth and hook a spring scale to the wire. Tighten the side bearing nuts while reading the spring scale until the specified preload is obtained.

Adjust the backlash between the reduction gear and pinion after installing the differential carrier assembly to the transmission case. To measure the backlash, set a dial indicator with its spindle pointing squarely to the tooth face of the reduction gear. With the pinion held, move the gear back and forth to read the indicator. Adjust the backlash using the left and right side bearing nuts and pinion shims.

NOTE Before measuring the preload, tap the back of the reduction gear with a copper hammer while rotating the gear to center between bearing.

0.15 to 0.25 (0.0059 to 0.0098)

Backlash between reduction gear and pinion

Unit: mm (in.)

Preload for differential case side bearings

Min.

15 to 30 kgf (1.1 to 2.2 lbf) [1.5 to 2.9 N]

Max.

1.32 to 2.5 kgf•cm (2.9 to 5.5 lbf•ft) [13 to 25 N•m]

As force applied to reduction gear in tangential direction.

200247

Backlash Increase Decrease Decrease Increase 200246

Increase Backlash

Decrease 200248

2.15

Caterpillar cat ec20k ec25k forklift lift trucks service repair manual sna3ec2 30200 and up  
Caterpillar cat ec20k ec25k forklift lift trucks service repair manual sna3ec2 30200 and up  
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