4-22. AIR SYSTEM - Continued
4-22.10 Foot Throttle Valve.
This task covers
Shop Equipment, Automotive
22, Appendix E Pipe Sealant
Maintenance and Repair,
25, Appendix E Sealant
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
Truck Wheels Blocked
All Air Tanks Drained
Death or serious injury could occur if compressed air is directed against the skin. Always drain all air
tanks via the draincocks prior to maintaining the foot throttle valve.
The foot throttle is mounted in the cab adjacent to the drivers feet. The valve mechanism is mounted
beneath the cab floor. It may be easier to remove the front left hand wheel and access the valve
from beneath the truck rather than from the cab (as outlined below). This will depend on the amount
of corrosion and dirt on the fittings and mounting hardware.
Remove the three capscrews (1) and ease
the foot throttle up through the cab floor.
Tag and disconnect the air hoses A and B.
Lift valve assembly up into cab and remove
Coat threads of connectors (2) with pipe
sealant (item 22, Appendix E) and install in
Pull hoses up through cab floor and connect
to valve assembly. Be sure they are
connected to same ports as noted in step 2
of REMOVAL preceding.