TM 5-2420-230-24-1
f. Testing.
The IHMEE requires an escort and may not exceed 42 mph (68 km/h) when operating on primary
roads. Failure to comply may result in injury to personnel and/or damage to equipment.
(1)
Take vehicle for test drive (TM 5-2420-230-10). Carry out gentle braking to ensure correct operation of brakes.
(2)
When safe to do so, carry out heavy brake applications at increments of 10 mph (16 km/h) until you are satisfied
vehicle is pulling up straight and efficiently at 42 mph (68 km/h).
(3)
When applying brakes heavily at 42 mph (68 km/h), check for the following problems:
(a)
Is the vehicle pulling to left or right?
(b)
Are any wheels locking up?
(4)
If vehicle is pulling in any direction or one wheel is locking, readjust brakes.
(5)
Using same procedure, adjust slack adjuster one bolt head flat at a time at relevant wheel, and retest at 42 mph
(68 km/h).
(6)
After completing test run and upon returning to depot, travel 12-19 mi. (20-30 km) with no brake applications,
stop vehicle and, by hand, feel all four hub reduction cover plates in turn.
(7)
Excessive temperature on one hub indicates a binding brake. Readjust brake on hottest hub.
(8)
Retest brakes. If problem still exists after 12-19 mi. (20-30 km), further investigation must be carried out.
g. Follow-On Maintenance.
Remove "Do Not Operate" tag from ignition switch (TM 5-2420-230-10).
END OF TASK
8-7. SPRING BRAKE CHAMBER REPLACEMENT.
This Task Covers:
a. Removal
b. Installation
c. Follow-On Maintenance
INITIAL SETUP
Test Equipment
References
None
None
Tools and Special Tools
Equipment Conditions
Tool kit, general mechanics, Item 38, Appendix B
TM or Para
Condition Description
Air system drained.
Materials/Parts
Cap and plug set, Item 4, Appendix C
Spring brake chambers caged.
Cloth, lint-free, Item 10, Appendix C
Pin, cotter, Item 172, Appendix D
Drawings Required
Solvent, degreasing, Item 58, Appendix C
TM 5-2420-230-24P Figure 136
Tags, identification, Item 63, Appendix C
TM 5-2420-230-24P Figure 138
Ties, cable, Item 68, Appendix C
Estimated Time to Complete
Personnel Required
Refer to MAC in Appendix B
MOS 62B, Construction Equipment Repairer
Change 1
