1989 Volvo 740 Checking Fuel Pumps, Fuel Pressure and Regulator

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Filed Under (Volvo) by admin on 16-08-2010

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Connect gauge between fuel pipe and fuel distribution manifold, use hose 5116 and nipple 5265, Plug open end of hose with 5266. Turn gauge cock to position 1, pointing toward hose 5116. B13 Check Function Of Fuel Pump And Tank Pump Pressure sensor is located next to expansion tank in engine compartment. Disconnect connector from sensor. Turn on ignition. Connect wire (in connector) from relay to ground. (Note: both wires are yellow/black, check which one is ground). Fuel pumps should start and be clearly heard. B14 Check Tank Pump Unscrew fuel filler cap and listen. It is also possible to connect an ammeter between the fuse and pump wiring. 740 1985-on: fuse 11 760 up to 1987: fuse 11 760 1988/89: fuse 11/30 Current consumption: 1-2 A. If neither pump operates: Turn off ignition.

1989 Volvo 740 Beam Type Rear Axle General

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Filed Under (Uncategorized) by admin on 12-05-2010

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General The rear axle is attached to the body by support arms (1), a torque arm (2) and a torque arm frame (3). A panhard rod (4) is also installed between the rear axle and the crossmember, while an anti-roll bar (5) is mounted between the support arms. Final Drive
The following final drive ratios are available: 3.31:1, 3.54:1, 3.73:1, 3.91:1, and 4.10:1.The unit is of the hypoid bevel type, in which the shape of the spiral gear teeth permitsthe pinion to be located below the centre of the crown wheel (ring gear) affording quieteroperation and stronger teeth. Power is transmitted by rolling and sliding action betweenthe teeth under high pressure.The design imposes high demands on the lubricating oil, a special grade of which must be used.