Mack E7, Service Manual, Page: 139 / 303

200 BENCH PROCEDURES
Page 5-49
Figure 5-62 — Valve Rocker Arm Shaft Assembly (Without Engine Brake)
19. Install flat spring (2) and snap ring (1) on end
of shaft. Some rocker arm shafts are
equipped with threaded plugs and aluminum
washers instead of flat springs and snap
rings.
20. Check all rocker arms to make sure they
rotate freely.
Valve rocker arm shaft assembly will be installed
during engine assembly by inserting capscrews
(10) and washers (11) into holes in brackets (4)
and (8).
Valve Rocker Arm Shaft Assembly
(with Jacobs Engine Brake)
Refer to Figure 5-63.
The assembly procedure for rocker arm shaft with
engine brake is described below. The engine
brake arrangement includes exhaust valve rocker
arms with lash adjusters and a solenoid mounted
in the rocker arm shaft.
1. Position shaft (11) so that the oil supply
screw locating hole is in line with bracket
locating screw hole.
2. The offset side of bracket must be
positioned toward the right side of engine.
3. Assemble bracket with center threaded hole
(8) on press table. Press shaft into bracket
until oil hole in shaft is positioned under
threaded hole in bracket.
1. Snap ring
2. Flat spring
3. Inlet rocker arm
4. Brackets
5. Exhaust rocker arm
6. Spring
7. Locating screw and lock washer
8. Bracket with center threaded hole
9. Standard adjusting screws and jam nuts
10. Capscrews
11. Washers
12. Shaft
5-101.bk Page 49 Friday, March 17, 2006 11:05 AM