Chevrolet 1980 Light Duty Truck Repair Manual page 232

7A 5-10 A U TO M A TIC TR A N SM ISSIO N
7. R em ove 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. D O N O T USE C LO TH OR P A PE R TO D R Y
PA R T S - A IR D R Y PA RTS O N L Y .
P U M P T O C O N V E R T E R
H U B LIP SE A L
( >
S C R E W D R I V E R
W O O D B L O C K S
Figure 7A 5-47 Removing Pump to Converter Hub Lip Seal
w v^O D BLOCKS
Figure 7A5-48 Installing Hub Lip Seal
Figure 7A5-49 Checking Pump Body to Gear Face Clearance
P U M P B O D Y
J - 213 5 9
PUMP TO
CONVERTER
HUB LIP SEAL
PUMP BODY
NOTICE:
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.
M axim um clearance is 0.005 in. If bushing is damaged, 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 pump
body is otherwise suitable for reuse), replace seal.
7. With parts clean and dry, pump gears in pump body
and check pump body face to gear face clearance. Clearance
should be 0.0005 to 0.0015 in. (Figure 7A5-49).
Reassem bly
1. R eplace hub lip seal if defective (Figs. 7A5-48).
2. Place pump body on w ood blocks and pry out
defective seal. Coat outer diameter o f new seal with a
V O I D
C O N V E R T E R
C L U T C H
A P P L Y - 3 5 0
S E A L
D R A I N
B A C K
E X H A U S T
Figure 7A 5-50 Pump Body Oil Passages
R E V E R S E
E X H A U S T
P U M P
P R E S S U R E
E X H A U S T
E X H A U S T
C O O L E R
O U T
Figure 7A5-51 Pump Cover Oil Passages
C O O L E R
I N
I N T E R M E D I A T E
C L U T C H
D I R E C T
C L U T C H
F O R W A R D
C L U T C H
C O N V E R T E R
R E L E A S E
S U C T I O N
P U M P
P R E S S U R E
E X H A U S T
R E V E R S E
S U C T I O N
C O N V E R T E R
R E L E A S E
F O R W A R D
C L U T C H
D I R E C T
C L U T C H