Mack E7, Руководство по обслуживанию

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200 SPECIFICATIONS
CYLINDER HEAD (CONT.)
Injection nozzle holder insert to bore fit — upper and intermediate 0.001–0.003 in. tight 0.0254–0.0762 mm
— lower 0.0015–.004 in. tight 0.0381–0.1016 mm
Injection nozzle holder insert bore — upper and intermediate bore 0.9360–0.9375 in. 23.7744–23.8125 mm
— bottom bore 0.904–0.906 in. 22.962–23.012 mm
Injection nozzle holder insert OD — upper and intermediate 0.9390–0.9385 in. 23.8506–23.8379 mm
— lower 1/2 inch (12.7 mm) 0.9080–0.9075 in. 23.0632–23.0505 mm
Fire ring groove — width 0.030–0.036 in. 0.762–0.914 mm
— depth 0.005–0.013 in. 0.127–0.330 mm
— ID 5.137–5.139 in. 130.479–130.531 mm
Valve guide OD 0.6886–0.6881 in. 17.4904–17.4777 mm
Valve guide ream ID (after installation)
inlet and exhaust (used with 3/8 valve stem)
0.3745–0.3755 in. 9.5123–9.5377 mm
Top end of valve guide to valve spring seat 0.959 ± 0.040 in. 24.359 ± 1.016 mm
Valve guide bore in head 0.686–0.687 in. 17.424–17.450 mm
Valve guide to bore (press fit) 0.0011–0.0026 in. 0.0279–0.0660 mm
Valve guide extension (fire deck to top of guide) 5.24 ± 0.03 in. 113.096 ± 0.762 mm
Yoke guide pin OD 0.4389–0.4392 in. 11.1481–11.1557 mm
Yoke guide pin installed height 1.848–1.918 in. 46.939–48.717 mm
Valve seat width — exhaust
0.051–0.081 or
1/16 ± 1/64 in.
1.295–2.057 mm or
1.588 ± 0.397 mm
— inlet
0.051–0.081 or
1/16 ± 1/64 in.
1.295–2.057 mm or
1.588 ± 0.397 mm
Valve seat insert face angle
Before November 1996 — inlet and exhaust 30
°
– 0
'
/+30
'
November 1996 and later — inlet 20 ° 30
'
± 15
'
— exhaust 30 ° – 0
'
/+30
'
Valve seat width runout 0.001 in. F.I.M. 0.0254 mm
Valve seat insert counterbore diameter — exhaust 1.6875–1.6885 in. 42.8625–42.8879 mm
— inlet 1.8285–1.8295 in. 46.4439–46.4693 mm
Valve seat OD — exhaust 1.692–1.693 in. 42.977–43.002 mm
— inlet 1.831–1.832 in. 46.507–46.533 mm
Valve seat insert press fit in head — exhaust 0.0035–0.0055 in. 0.0889–0.1397 mm
— inlet 0.0015–0.0035 in. 0.0381–0.0889 mm
Valve seat counterbore depth — exhaust 0.372–0.376 in. 9.449–9.550 mm
— inlet 0.360–0.364 in. 9.144–9.246 mm
Fits and Limits (Cont.)
Component
Standard Size or Fit
English Metric
5-101.bk Page 16 Friday, March 17, 2006 11:05 AM