Chevrolet 10 series 1973, Overhaul Manual

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7 A - 4 0 A U T O M A T IC T R A N S M IS S IO N
NOTE: A needle bearing is used on C series
Truck instead of a thrust washer.
7. Remove pump cover and stator shaft
assembly from pump body (fig. 59M).
8. Remove pump drive gear and driven gear.
9. Remove pump outside diameter to case (square cut)
"O" ring seal. Discard seal.
Inspection
1. Wash all parts in cleaning solvent and blow out all
oil passages. DO NOT USE RAGS TO DRY
PARTS.
CAUTION: Some solvents may be harmful to
rubber seals.
2. Inspect pump gears for nicks or damage.
3. Inspect body and cover faces for nicks or scoring.
Inspect cover hub O.D. for nicks or burrs which
might damage clutch drum bushing journal.
4. Inspect body bushing for galling or scoring. Check
clearance between body bushing and converter
pump hub. Maximum clearance is .005". If the
bushing is damaged, the oil pump body should be
replaced.
5. Inspect converter housing hub O.D. for nicks or
burrs which might damage pump seal or bushing.
Repair or replace as necessary.
6. If hub lip seal is damaged or is leaking (and the
pump body is otherwise suitable for reuse), replace
seal.
7. With parts clean and dry, install pump gears in
pump body and check pump body face to gear face
clearance. Clearance should be .0005"- .0015" (fig.
60M).
Reassembly
1. Replace hub lip seal if defective (figs. 61M and
62M).
2. Place pump body on wood blocks and pry out
defective seal. Coat outer diameter of new seal with
a non-hardening sealer and install seal using seal
installer J-21359 to seat seal fully in counterbore.
3. Install pump drive gear and driven gear (fig. 63M).
Fig. 6 0 M -C h e ckin g Pump Body to Gear Face
Clearance
PUMP B O D Y
PUMP C O V E R A N D
STATOR SHAFT
ASSEMBLY
PUMP TO C O N V E R T E R
HUB LIP S E A L
PUMP B O D Y
W O O D B L O C K S
Fig. 59M --Separating Pump Cover from Pump Body
Fig. 6 1 M -R e m oving Pump to C onverter Hub Lip Seal
OVERHAUL M ANUAL