5-101.bk Page 18 Friday, March 17, 2006 11:05 AM Fits and Limits (Cont.) Page 2-18 200 SPECIFICATIONS Component Standard Size or Fit English Metric PISTON (CONT.) Ring groove service limit over 0.120 inch pins (3.048 mm) Top groove 4.912 in. 124.765 mm PISTON RINGS Piston ring end gap — when checked in 4.875 gauge diameter Compression rings — No. 349GC3101 Compression rings — No. 349GC3102 Oil control ring — No. 350GC340 Piston ring side clearance (new) Piston ring side clearance (used) 0.016–0.028 in. 0.013–0.025 in. 0.013–0.028 in. 0.0016–0.0030 in. Maximum 0.0045 in. 0.406–0.711 mm 0.330–0.635 mm 0.330–0.711 mm 0.0406–0.0762 mm Maximum 0.1143 mm NOTE:
Refer to MACK branch or distributor for specifications for piston ring part numbers not listed above. NOTE: For every 0.001 in. (0.0254 mm) increase in gauge diameter, ring gap will increase by 0.003 in. (0.076 mm). ROCKER ARM Ratio Hole ID Hole-to-shaft clearance Shaft OD Push rod overall length — intake and non-brake exhaust (flat to cup top) Push rod overall length — exhaust w/Dynatard (flat to flat) 1.5:1 1.1306–1.1326 in. 0.004–0.0015 in. 1.1286–1.1291 in. 15.751–15.813 in. 16.353–16.388 in.
28.7172–28.7680 mm 0.1016–0.0381 mm 28.6664–28.6791 mm 400.075–401.650 mm 415.366–416.255 mm TIMING GEAR COVER Dowel Pins Holes in cylinder block (both) Hole in timing gear cover — RH for round pin — LH for diamond pin Pin OD — RH for round pin — LH for diamond pin, cylinder block end — LH for diamond pin, timing cover end Crankshaft seal mounting bore Seal square to hub Seal mounting bore-to-crank runout Hydraulic steering pump mounting bore 0.4987–0.4997 in. 0.5005–0.5012 in. 0.5577–0.5584 in. 0.5001–0.5003 in. 0.5001–0.5003 in. 0.5570–0.5575 in. 3.9995–4.0025 in. 0.010 in. 0.015 in. T.I.R.* 3.2525–3.2545 in.
12.6670–12.6924 mm 12.7127–12.7305 mm 14.1656–14.1834 mm 12.7025–12.7076 mm 12.7025–12.7076 mm 14.1478–14.1605 mm 101.5873–101.6635 mm 0.254 mm 0.381 mm* 82.6135–82.6643 mm * Must be held relative to main bearing bores. Check runout with an alignment bar installed through the cylinder block main bearing bores. TIMING GEAR Backlash — injection pump drive gear to injection pump driven gear — all other gears 0.0025–0.0095 in. 0.0013–0.0108 in. 0.0635–0.2413 mm 0.0330–0.2743 mm