TM-5-3805-254-14-P-2
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)
JUNE 1980
TM-5-3805-254-14-P-2 - Page 413 of 894
TRUCK SERVICE MANUAL
ENGINE
Valve Adjustment
The same engine position (VS Mark) used to adjust
injectors is used for setting intake and exhaust valves,
however, the valves to be adjusted are not the same
cylinder as injectors. In this position adjust valves for
cylinder No. 5.
See Table 14-9.
1. While adjusting valves, make sure compression
release, on those engines so equipped, is in running
position.
2.
Loosen locknut and back off adjusting screw. Insert
feeler gauge between rocker lever and crosshead. Valve
clearances are shown in Table 14-11. Turn screw down
until lever just touches gauge and lock in this position.
Tighten locknut to 30 to 40 ft-lb. [4.1 to 5.5 kg m] torque.
When using ST-669, torque to 25 to 35 ft-lb. [3.5 to 4.8
kg m]
3. Always make valve adjustment after injector
adjustment.
Move to next cylinder as indicated in Table
14-9 and repeat adjustments.
ADJUST INJECTORS AND VALVES
(TORQUE METHOD)
1. If used, pull compression release lever back and block
in open position while barring engine, this allows
crankshaft to be rotated without working against
compression.
2. Loosen the injector rocker lever adjusting nut on all
cylinders. This will aid in distinguishing between cylinders
adjusted and not adjusted.
3.
Bar engine in direction of rotation until a valve set
mark (Fig’s. 14-25 and 14-26) aligns with the boss on the
gear case cover. Example:
A or 1-6 "VS."
4. Check the valve rocker levers on the two cylinders
aligned as indicated on pulley (Example:
1 and 6
cylinders for A or 1-6 "VS"). On one cylinder of the pair,
both rocker levers will be free and valves closed, this is
cylinder to be adjusted.
5. Adjust injector plunger first, then crossheads and
valves to clearances indicated in the following
paragraphs.
Injector Plunger Adjustment - Torque Method
The injector plungers are adjusted with a torque wrench
and a screwdriver adapter to a definite torque setting.
See
Fig. 14-30.
1. Turn adjusting screw down until plunger contacts cup
and advance an additional 15 degrees to squeeze oil
from cup.
2. Loosen adjusting screw one turn; then, tighten
adjusting screw making two or three passes with torque
wrench, to values shown in Table 14-12.
Back to Top
