Detroit Diesel 4000 Series, Service Manual

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SERIES 4000 12/16V SERVICE MANUAL
2. Connect the high-pressure hose of the hydraulic hand pump to hydraulic pretensioner (3).
Close the pressure bleed screw hand-tight. Position magnetic-based dial indicator bridge
(J 43196) (2) with both indicator pins centered on each main bearing stud. See Figure 23.
1. Main Bearing Stud Tensioner 3. Hydraulic Pretensioner
2. J 43196 Dial Indicator Bridge
Figure 23 Connecting High-pressure Hose
3. Operate the hydraulic hand pump to elongate the studs and measure breakaway pressure.
Record breakaway pressure on the main bearing installation report. Elongate the stud only
enough to rotate nut loose. Using a pin, rotate the nuts on the main bearing cap studs until
loose (three full turns). Open the pressure bleed valve on the hydraulic pump and release
all pressure. Remove the magnetic-base dial indicator bridge.
4. Remove hydraulic pretensioners and attach a slide hammer to the 12 mm bolt hole in the
center of the main bearing cap. Using the slide hammer, loosen the main bearing cap.
Remove the slide hammer, main bearing stud nuts, main bearing cap, and lower main
bearing shell.
NOTE:
Care should be taken not to allow the main bearing cap to drop and become damaged.
All information subject to change without notice.
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