Volvo 740 1989 Owner's Maintenance Manual page 74

1989 Volvo 740
When preparing for trailer hauling, observe the following:
Use a trailer hitch which meets Federal Safely Standards tor rear end collisions (FMVSS 301-75). For
trailer weights exceeding 2000 lbs (908 kgs) use only a trailer hitch offered as a Genuine Volvo
Accessory. An automatic transmission oil cooler must also be installed, since the automatic transmission
is subject to increased load and temperature, certain vehicles are equipped with this extra oil cooler as
standard equipment. Consult your Volvo dealer for further information.
Maximum trailer weight recommended by Volvo is 3,300 lbs (1,500 kgs). Observe legal requirements
of the state or province in which the vehicles are registered.
All Volvo models are equipped with energy-absorbing shock-mounted bumpers. Trailer hitch
installation should not interfere with the proper operation of this bumper system.
WARNING!
Bumper-attached trailer hitches must not be used on Volvos, nor should safety chains be attached to
the bumper. Trailer hitches attaching to the vehicle rear axle must also not be used.
WARNING!
Never connect a trailer's hydraulic brake system directly to the vehicle brake system, nor a trailer's
lighting system directly to the vehicle lighting system.
Consult your nearest authorized Volvo dealer tor correct installation.
Trailer towing does not normally present any particular problems. but take into consideration:
Recommenced hitch tongue load is 165 lbs (75 kgs) tor trailer weights below 2,650 lbs (1,200 kgs)
and 143-154 lbs (65-70 kgs) for trailer weights above 2,650 lbs (1,200 kgs). However, the hitch tongue
load should not exceed 200 lbs (90 kgs).
For trailer weights between 2,650-3,300 lbs (1,200-1,500 kgs) a top speed of 50 mph (80 km/h)
should never be exceeded.
Engine and transmission are subject to increased loads. Therefore, engine coolant temperature should
be closely watched when driving in hot climates or hilly terrain. Use lower gear and turn off air
conditioner if temperature gauge pointer enters the red range.
Disengage the overdrive on models with automatic transmission.
Avoid overload and other abusive operation.
Hauling a trailer affects handling, durability and economy.
It is necessary to balance trailer brakes with the towing vehicle brakes to provide a safe stop. Check
and observe State and Local regulations.
More frequent vehicle maintenance is required.
Remove the ball and drawbar assembly when the hitch is not being used.
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