Detroit Diesel MBE 4000 Service Manual page 329

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6. Using a dial gauge, measure the end play of the pump drive gear and idler gear against

the walls of the pump housing. See Figure 3-15 for set-up and listed in Table 3-2 are

the specifications.

1. Dial Gauge

[a] Secure the assembled oil pump in a vise, with the face plate pointing up.

[b] Rest the dial gauge support on the face plate.

[c] Set up the dial gauge so that the feeler on the end of the gauge touches the exposed

end of the pump drive gear with some preload.

[d] Force the pump drive gear downward as far as it will go.

[e] At this position, adjust the scale of the dial gauge to "0" (zero).

[f] Now force the pump drive gear upward as far as it will go. Read the measurement on

the dial gauge and make sure it conforms to the range listed in Table 3-2. Replace

the pump, if necessary.

[g] Repeat this procedure for the idler gear.

7. Install the oil pump in the cylinder block. Refer to section 3.4.4.

All information subject to change without notice.

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Measuring the Clearance of the Pump Drive Gears

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MBE 4000 SERVICE MANUAL

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