Volvo Maintenance Hints for 7xx/9xx - Bill Garland's Nuclear ...

the level float rattling, then it has a float. Check the bottom of the tank for the molded-in words
"without float sensor": if you see. these, you need a replacement tank with the float. If you don't
have the float, buy a new reservoir p/n 9122997 (around $30). Make sure you read all assembly
instructions below first, especially to confirm you have the float inside the tank. There is a "Low
Coolant" lamp position already in the row of panel warning lamps.
Bill of Materials:
740 Variant: Float Level Sensor Switch: Nohken LS-11P-0A, miniature 10VA switch
(normally open) with polypropylene float, temperature rating above 100 C, and stem and
flat flange face. This is known in the trade as a "liquid level switch".
There are two sources: (1) Scientific Technologies Inc. at 6550 Dumbarton
Circle, Fremont, CA 94555-3611, 510-608-3400. Order STI part number
22152; cost is approximately $15 plus a fairly hefty shipping charge. Web site
is http://www.sti.com (2) Less expensive is the version from McMaster-Carr
(part number 50195K74 for $19.55- get the "NO" Normally Open switch)
STI
Level
Sensor
940 Variant: Volvo "Level Guard" p/n 3547710) approx $15 from Borton's Volvo, http://
www.borton.com , FCPGroton, or from a junkyard off a wrecked 960 car. This device
resembles a thin tube about three inches long. If you get it from a 960, take the electrical
connector as well (the same connector as is on the brake and washer reservoir fluid
sensors).
b) Volvo 12v 1.2w lamp for instrument panel: Volvo uses two instrument panels (Yazaki and
VDO) and several kinds of bulbs and bulb holders for their panels. One is a replaceable bulb
with wire leads, inserted into a holder that has a plastic locking ring. The other is a bulb
soldered into a holder with metal locking tabs. You will probably have to pull your panel to
determine which make and lamp type your car has. Dealer prices are quite high (~$3-4 per bulb
and $5-6 per holder). Examine the bulbs carefully: in some cases, you can find them at Walmart
(e.g., Yazaki 158 bulbs or Osram 2721).
● 740 with Yazaki panel: Volvo p/n 2721 1.2w replaceable bulb with leads
● 940 with VDO panel: Volvo p/n 966326-1 1.2w bulb fixed into holder
● 940 with Yazaki panel: Volvo p/n 942327-8 1.2w bulb; Volvo p/n 9128743-3 Lamp socket.
You have spares of this socket on your panel in unused slots.
c) Instrument panel female metal electrical connector inserted into "C" harness connector:
● 740 and 940 before 1994: ell-shaped "C" connector uses Volvo p/n 949542 (likewise "L"
shaped)
● 940 1994+: flat "C" connector uses flat Volvo p/n 9148152
You can find these easily at boneyards: pull the panel, cut off the entire "C"
harness connector, and re-use the metal connectors inside.