Hummer H1 Service Manual page 332

Section 5 Transmission/Trans er Case
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COOLER LINE AND BYPASS VALVE SERVICE
The transmission and transfer case oil cooler lines are replace-
able parts.
The lines consist of metal tubing interconnected by sections of
rubber hose (Figure 5-31). Each of the tube or hose sections
can be replaced separately. It is not necessary to replace com-
plete assemblies.
On Hummers, the cooler lines are fastened to the trans
mission with quick connect fittings. The flared end of the line
fits tightly into the adapter and is secured to the adapter with a
clip. The clip is then secured with a nylon retainer.
NYLON
RETAINER CLIP
COOLER LINES
(TO TRANSFER CASE)
TRANSMISSION
BYPASS
VALVE
Figure 5-31: Bypass Valve Connections
A bypass valve is used in all Hummer vehicles (Figure 5-32).
The valve limits pressure buildup in the oil cooler and
lines.The bypass valve is attached to the passenger side cross-
member-to-frame bracket bolt. The cooler lines are attached to
body/chassis components with clamps (Figure 5-31).
METAL TUBE
TO
TRANSFER
CASE
BYPASS
VALVE
Figure 5-32: Transmission/Transfer Case Oil Cooler
Line Connection
05745159
ADAPTER
QUICK
CONNECT
FITTING
TEE
FITTINGS
TO
TRANSMISSION
COOLER
TEE
CHASSIS
METAL
CLAMP
TUBE
Transmission/Transfer Case
FILL TUBE REPLACEMENT
1. Remove dipstick from fill tube (Figure 5-33).
2. Remove console and engine cover.
3. Remove bolts attaching fill tube bracket to heat shield and
intake manifold (Figure 5-33).
4. Work fill tube out of transmission.
5. Remove fill tube seal from transmission. Discard if
damaged.
Figure 5-33: Fill Tube Attachment
6. Install fill tube seal in transmission.
7. Push fill tube into transmission.
8. Secure fill tube to the heat shield and intake manifold.
Tighten intake manifoldbolt to 31 lb-ft (42 N•m).
9. Install dipstick in fill tube.
10. Install engine cover and console.
11. Start engine and top off transmission fluid level if
required.
TO
5-133
DIPSTICK
FILL TUBE
FILL TUBE SEAL