2 minute read
Main Housing
ALLISON 1000 & 2000 PRODUCT FAMILIES MAIN HOUSING
A. Main Housing
J. Identification
Plate B. Front
Sealing
Surface G. Speed Sensor
Bore
I. Filltube Bore C. Rear
Sealing
Surface
D. PTO
Mounting
Pads
Front View H. Selector
Shaft Bore
A. Inspect the main housing for impact damage, chips and cracks. Inspect threaded holes for damage, stripping and cracking. Replace the main housing if damage cannot be repaired. B. Inspect the sealing surface and
machined bore at the front of the
main housing for nicks, burrs, scratches, scoring and other damage which might cause improper sealing or component seating. Replace the housing if damage cannot be repaired using a light stone or crocus cloth. C. Inspect the sealing surface at the rear of the main housing for nicks, burrs, scratches, scoring and other damage which might cause improper sealing or component seating. Replace the housing if damage cannot be repaired using a light stone or crocus cloth. D. Inspect the PTO mounting pad surfaces for nicks, burrs, scratches, scoring and other damage which might cause improper sealing or PTO seating. Replace the housing if damage cannot be repaired using a light stone or crocus cloth. E,G,H,I. Inspect machined bores for nicks, burrs, scratches, scoring and other damage which might cause improper sealing or component seating. Replace the housing if damage cannot be repaired using a light stone or crocus cloth.
Rear View
F. Splines E. Electrical
Connector
Bore
(continued)
Inspect the flat sealing surface Inspect the flat sealing surface and the machined bore at the and the machined bore at the front of the main housing. front of the main housing.
Oil Passage Detail Front View
Exhaust To Sump Oil Passage Detail Rear View
C3 Spline Torque Converter Clutch
C3 Feed Main N/A
C4 Spline C4 Feed C5 Spline
Exhaust To Sump Suction
Exhaust C2 Exhaust Backfill Knockdown Overdrive C1 Exhaust Backfill Control Main From Filter
Control Main To Filter Park Pawl Support Pin Bore C5 Feed Main Connector Bore
F. Inspect splines for step wear, twisting, chips, burrs and signs of battering. Replace the main housing if damage cannot be repaired using a soft stone or crocus cloth.
J. The identification plate contains information necessary to perform service work on the transmission. The model number, serial number, electronic "E" number and date of manufacture are included, as well as individual component group numbers which are used to identify specific components used to build each major section of the transmission. Remove and reattach the plate if it is not securely riveted to the transmission main housing.
