Mack MP7 - Expansion Plug Replacement

Page 180
REPAIR INSTRUCTIONS, PART 1
235
Figure 235 — Flaring Copper Sleeve Using Installation
Tool
11. Remove the sleeve installation tool from the
injector bore.
12. Using brush, J 42885-9, and extension,
J 42885-1, ensure that the copper sleeve
bore is clean. Insert a new washer and the
injector or a sealing plug, 9998251.
If the injector is not being installed immediately,
install the sealing plug into the injector bore to
protect it from debris.
236
Figure 236 — Unit Injector Bore Sealing Plug
Expansion Plug Replacement
[213 FP]
The cylinder head has three expansion plugs of
different sizes.
— 29 mm (1-9/64 or 1.142 inch)
— 40 mm (1-37/64 or 1.575 inch)
— 50 mm (1-31/32 or 1.968 inch)
All are installed using the following procedure:
1. Clean the plug bore thoroughly.
2. Apply Loctite
®
277 sealer, or equivalent, to
the expansion plug and plug bore.
3. Using a socket, extension and a hammer,
press the expansion plug into the plug bore.
4. Repeat steps 1–3 for each new plug.
The plug should be installed flush to 0.508 mm
(0.020 inch) below the surface.
237
Figure 237 — Expansion Plug Installation
1. Flaring Tool 88800196
1. Socket and Extension 2. Hammer