TM 9-2320-363-34-2
ADJUSTABLE IDLER GEAR REPLACEMENT (CONT)
2.
REMOVE ADJUSTABLE IDLER GEAR (3) AND HUB (4) FROM GEAR HOUSING ASSEMBLY (5).
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WARNING
To prevent injury, compressed air will not exceed 30 psi (207 kPa). Use only
with effective chip guarding and personal protective equipment, goggles,
shield, and gloves.
1.
WASH ADJUSTABLE IDLER GEAR, HUB, AND RETAINING PLATE THOROUGHLY IN CLEAN
SOLVENT AND DRY WITH COMPRESSED AIR.
2.
USE GENERAL CLEANING METHODS TO CLEAN ALL PARTS (PAGE 2-30).
INSPECTION
1.
EXAMINE ADJUSTABLE IDLER GEAR TEETH FOR SCORING, PITTNG, AND WEAR. IF DAMAGED
OR WORN, REPLACE ADJUSTABLE IDLER GEAR. INSPECT OTHER GEAR TRAIN GEARS.
2.
INSPECT CONTACT SURFACE OF HUB FOR SCORING OR EVIDENCE OF OVERHEATING (BLUE
DISCOLORATION). REPLACE HUB IF IT HAS BEEN OVERHEATED. CHECK LUBRICATION HOLE
AND GEAR CASE GALLERY FOR BLOCKAGE. SLIGHT IRREGULARITIES IN HUB CONTACT
SURFACE MAY BE REMOVED WITH FINE STONE OR EMERY CLOTH.
3.
INSPECT BUSHING CONTACT SURFACE FOR SIGNS OF SCORING, DISCOLORATION DUE TO
OVERHEATING, OR EXCESSIVE WEAR. ALLOWABLE CLEARANCE BETWEEN BUSHING AND HUB
IS 0.0013-0.0030 IN. (0.035-0.078 mm). REPLACE GEAR AND BUSHING AS ASSEMBLY IF
CLEARANCE IS MORE THAN ALLOWABLE, OR IF SURFACE OF BUSHING IS SCORED OR HAS
BEEN OVERHEATED.
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