[213 Ep] Valve Guides - Mack E7 Service Manual

5-101.bk Page 30 Friday, March 17, 2006 11:05 AM
Refer to Figure 5-33.
6. Install a socket (1) and T-handle (2) on
cutter head (3). Using T-handle, rotate cutter
head in a clockwise direction only, applying
an even downward pressure to cut fire ring
groove.
1
3
Figure 5-33 — Cutting Ring Groove
1. Socket
2. T-handle
7. After groove is cut, remove cutter head and
cutter base from cylinder head.
8. Use a honing stone to remove any burrs
around fire ring groove.
9. Check fire ring groove depth with depth
gauge J 26948 to verify that groove depth
meets specification. If groove depth does
not meet specification, recut as necessary.
10. Repeat above procedure with each fire ring
groove cut.
To ensure proper groove depth, always adjust
cutting tool height when cutting next groove.
Page 5-30
200 BENCH PROCEDURES
2
200292a
3. Cutter head (J 37719)

[213 EP] Valve Guides

INLET AND EXHAUST VALVE GUIDE
DIMENSIONS
Refer to Figure 5-34.
Valve guide ID (3) — 3/8 inch (9.53 mm)
Top end of guide to valve spring seat (4) —
0.959 ± 0.040 inch (24.36 ± 1.02 mm)
Valve guide extension, fire deck to top
of guide (5) — 5.24 ± 0.03 inch (133.10
± 0.76 mm)
Valve guide bore in head (6) — 0.687–
0.686 inch (17.450–17.424 mm)
Valve guide OD (7) — 0.6886–0.6881 inch
(17.4904–17.4777 mm)
1
7
Figure 5-34 — Valve Guide Dimensions
1. Exhaust valve guide 5. Valve guide extension,
2. Inlet valve guide
3. Valve guide ID 6. Valve guide bore in
4. Top end of guide to
valve spring seat 7. Valve guide OD
2
3
4
5
6
200293a
fire deck to top of guide
head