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P3 Planetary Assembly
Park pawl equipped (left) and non-park pawl carriers with P3 Sun Gears installed.
ALLISON 1000 & 2000 PRODUCT FAMILIES P3 PLANETARY ASSEMBLY
A. Housing
Pinion Pin
E. Splines P3 Sun Gear
B. Pinion Gears
F. Park Pawl
Engagement Cogs
A. Inspect the carrier housing for cracks, chips, impact damage and signs of discoloration. Replace the assembly if damage cannot be repaired using a soft stone or crocus cloth. B. Inspect pinion gears for chipped, broken, pitted or missing teeth. Replace the assembly if damage cannot be repaired using a soft stone or crocus cloth. C. Inspect the pinion thrust washers for damage, distortion and signs of discoloration. Replace the carrier assembly if any damage is identified. Replace the carrier assembly if any pinion gear endplay readings exceed 1.010mm (0.040 inch). D. With the planetary clean and oiled, check the pinion needle bearings by slowly spinning each pinion gear and feeling for rough spots. Replace the carrier assembly if any pinion gear has rough spots or makes noise during the spin test. E. Inspect the splines where the output shaft indexes for step wear, twisting, chips, burrs and signs of battering. Replace the assembly if damage cannot be repaired using a soft stone or crocus cloth. F. Inspect the park pawl cogs for bending, distortion, step wear, scoring, chips, and rounded edges. Replace the assembly if any damage is detected.
