ALLISON 1000 & 2000 PRODUCT FAMILIES
GENERAL INSPECTION GUIDELINES FOR CAST PARTS & MACHINED SURFACES A. Housings
B. Machined Surfaces
D. Splines A. Replace housings or other cast
parts that are cracked or broken. Inspect clutch housing sealing surfaces for imperfections that could damage the piston seals or interfere with mating parts. Inspect threaded holes for bad threads. Clean damaged threads with the correct size tap. B. Inspect all machined surfaces
for damage that could cause fluid leakage. Inspect mounting faces and bores for damage.
C. Inspect all fluid passages for obstructions, porosity, broken lands, cracks and land surface imperfections. D. Replace housings that have splines worn beyond wear limits. Refer to the Wear Limits in Service Manual SM3191EN. NOTE: Do not use impact guns (air
wrenches, electric impact wrenches, etc.) when working with aluminum threads or when torque sequencing bolts. NOTE: Use of caustic acid and hot
tanks can damage aluminum parts, including sealring grooves and machined surfaces. 4
ALLISON
TRANSMISSION
2005 General Motors Corporation.
TECHNICIANS’
GUIDE
C. Fluid Passages
