Lull 944E-42 Service Manual - Manual (Page 202)

Transmission: ZF 4WG-92/98 TSC & Transfer Case: ZF TB92-I4
6.26 Model 644E-42/944E-42 Rev. 6/04
6.13.2 Transfer Case Internal Component
Troubleshooting
Note: The following conditions may be noticed when
inspecting parts during transfer case repair. Perform all
remedies that apply to the conditions noticed.
Problem Cause Remedy (See Note)
1. Gear teeth worn or grooved. 1. Insufficient lubrication. • Replace gear(s) as needed.
• Fill transfer case with to correct
level with Universal Tractor Fluid.
Refer to Section 2.5.10, “Fluid and
Lubricant Capacities.”
2. Gear teeth overheated. 1. Prolonged operation at high
temperatures (transfer case oil
above 230° F [110° C]). Refer to
Section 6.13.1, “Transfer Case
Troubleshooting,” Problem 4.
“Transfer case overheating
(oil above 230° F [110° C]).”
• Replace gear(s) as needed.
• Fill transfer case to correct level
with Universal Tractor. Refer to
Section 2.5.10, “Fluid and Lubri-
cant Capacities.”
3. Gear teeth pitted. 1. Insufficient lubrication.
2. Lubricant contaminated.
• Replace gear(s) as needed.
• Fill transfer case to correct level
with Universal Tractor Fluid. Refer
to Section 2.5.10, “Fluid and Lubri-
cant Capacities.”
4. Worn inside cup or worn
tapered roller bearing.
1. Incorrect bearing “end play.”
2. Insufficient lubrication.
3. Lubricant contaminated.
• Replace bearing.
• Check end play.
• Fill transfer case to correct level
with Universal Tractor Fluid. Refer
to Section 2.5.10, “Fluid and Lubri-
cant Capacities.”