TM 9-2320-279-34-1
CHAPTER 8
TRANSFER CASE MAINTENANCE
Contents
Para
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1
Transfer Case Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-2
Transfer Case Mounting Brackets Removal/Installation.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-3
Transfer Case Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-4
Oil Seal Removal/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-5
Top Input Shaft Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CenterShaftRepair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-6
8-7
Lower Rear Output Shaft Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-8
Lower Front Output Shaft Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-9
Upper Shift Rod Assembly Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lower Shift Rod Assembly Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-10
8-11
HI-LO Range Transfer Case Lock-up Valve Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Traction Control Valve Repair.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-12
8-13
Lockout Shift Chamber Removal/Repair/Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Pump Removal/Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-14
8-15
Lubrication Pump Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-16
Section I. INTRODUCTION
Page
8-1
8-2
8-11
8-12
8-28
8-29
8-34
8-36
8-38
8-41
8-42
8-44
8-45
8-47
8-52
8-54
8-1.
GENERAL.
This chapter contains maintenance instructions for removal, installation, and repair of
the transfer case and components at the direct support and general support maintenance level.
Subassemblies and parts which must be removed before the transfer case can be removed are referenced
to other paragraphs of this manual or in TM 9-2320-279-20. The HEMTT transfer is supplied as a dressed
assembly including output yoke half. All HEMTTS except the M984E1 use the output yoke half supplied
with the transfer. When replacing the transfer case on the M984E1 the output yoke on the new dressed
transfer will have to be replaced with an M984E1 yoke end. Exchange the yoke end on the old transfer
with that on the new, if the old yoke is still serviceable. If the old yoke end is not serviceable a new yoke
end will have to be ordered.
8-1
