Spicer Tandem Drive Axle Dual Range & Double Planetary 34,000-45,000 lbs User Manual

Page 57

Forward and Rear Axle -- Adjust Differential Bearing Preload:

At the teeth-side of ring gear, position bearing adjuster until its first

thread is visible.

At the back-face side of ring gear, tighten adjuster until there is no

backlash.

At the teeth-side of ring gear, tighten adjuster until it contacts the

bearing cup. Continue tightening adjuster two or three notches. This

will preload bearings and provide backlash.

4. Check Ring Gear Backlash.

Measure backlash with a dial indicator.

Specifications are listed below. Refer to page 23 for detailed instruc-

tions on adjusting backlash.

Ring Gear Backlash Specifications
USED GEARING - Reset to backlash recorded before disassembly.
NEW GEARING -

Backlash should be between 0.006" and 0.016".

5. Check Ring Gear Tooth Contact.

Pain ring gear teeth and check

toothe contact pattern. Correct toothe patterns are illustrated below. For

checking and adjusting procedures, see page 24.

CORRECT PATTERN (USED GEARING)

●

Pocket may be

extended.

pattern along the

face width

could be longer.

Adjusting Bearing Adjuster.

Checking Ring Gear Backlash.

CORRECT PATTERN (NEW GEARING)

Could vary in length.

Pattern should cover

1/2 tooth or more

(face width).

●

pattern should

be evenly centered

between tooth

top land and

root.

●

Pattern should be clear of tooth toe.

With ring gear and pinion adjusted correctly, align adjusters and

locks, then tighten differential bearing cap screws to correct torque

(see chart page 58). Install cotter pin in one adjuster lock. Install cap

screws in opposite adjuster lock and tighten to correct torque (see

chart page 58). Lockwire bearing and adjuster lock cap screws.