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Technical Bulletin

Bulletin No.: TCH-001-005 Effective Date: 11-24-1976 Cancels: N/A Page: 1 of 2

Subject: BENDIX

COMPRESSORS ON CUMMINS ENGINES,

TU-FLO

™

500 & 600

The attached copy of Cummins Service/Parts topics 74T5-12S1 dated 10/74 describes a

design change on Cummins PT Fuel Pumps (type G). The change adds a tachometer

drive to the front cover of the fuel pump. The tach drive is dependent upon oil from the

compressor for lubrication, and in order to receive an adequate supply of oil, the rear oil

seal on Bendix compressors used on Cummins’ engines has been eliminated, and the

hole in the rear compressor flange plugged.

All new and remanufactured Bendix compressors have incorporated this change for

quite some time, however, as this was a running change, it is likely that distributor

inventory will include some compressors with the rear oil seal and vent hole open.

In Summary:

I. Compressors either with or without

the rear oil seal may be used on engines

without the tachometer drive on the P.T. Pump.

II. Only compressors without a rear oil seal may be used on engines with the

tachometer drive on the P.T. Pump.

According to Cummins, the use of compressors with a rear oil seal on engines with a

tachometer drive on the P.T. Pump will result in premature failure of the tachometer

drive.

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Technical BulletinBulletin No.: TCH-001-005 Effective Date: 11-24-1976 Cancels: N/A Page: 1 of 2Subject: BENDIX® COMPRESSORS ON CU

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BENDIX TCH-001-005 Manual de usuario