Continuation Of Adjustments; [213 Nb] Valve Yoke, Valve Lash And Slave Piston Adjustments (Jacobs Brake Engine); Description - Mack E7 Service Manual

5-101.bk Page 6 Friday, March 17, 2006 11:05 AM
200 SETUP AND ADJUSTMENTS
Figure 7-6 — Exhaust Valve Adjustment
1. Thickness gauge

Continuation of Adjustments

Refer to Figure 7-7.
1. Using engine barring socket J 38587-A,
manually rotate engine in normal rotation
direction 120 degrees until pointer in
flywheel housing aligns with the "5" mark on
the flywheel. The No. 5 piston will be on the
compression stroke. If engine is equipped
with a pointer mounted on the timing gear
cover and marks on the vibration damper,
rotate the engine until the pointer marked
VALVE aligns with the "5" mark on the
vibration damper.
2. Adjust the yoke and valve lash as previously
outlined for the No. 1 cylinder.
E7 engine firing order is 1 - 5 - 3 - 6 - 2 - 4.
Page 7-6
2. Adjusting wrench
J 37092
3. Continue adjusting yoke and valve lash for
the remaining cylinders, in firing order.
Rotate crankshaft to place each piston
30 degrees past TDC.
Figure 7-7 — Engine Crankshaft Rotation
[213 NB] VALVE YOKE, VALVE
LASH AND SLAVE PISTON
ADJUSTMENTS (JACOBS
BRAKE ENGINE)

Description

Make yoke and valve lash adjustments for each
cylinder in the proper order. Adjust the yoke
clearance first, then adjust the valve lash. Adjust
the Jake Brake slave piston last. The flywheel has
a stamped timing scale TC through 45 degrees of
crankshaft rotation for setting and checking pump-
to-engine timing. Also, the flywheel has three
stamped valve setting locations.