Lift Pump Lever Position Confusion?

Lift Pump Lever Position Confusion?

07-03-2001, 07:09 PM

#1 (permalink)

KEENO

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Join Date: Jan 2000 Location: FRANKLIN, TN, USA Posts: 504

Lift Pump Lever Position Confusion?

Hey Gang!

I'm prepin' my truck for a 2 1/2 week trip to Jackson Hole, Wy. & Canyonland area of Utah.

I replaced a questionable Lift Pump (Carter brand) w/ a new Cummins Lift Pump. Installation was straight forward.

My question is in regard to Lift Pump Manual Primimg Lever "position" after purging the pump & feed line of air thru the "low pressure bleeding screw".

IN WHICH POSITION SHOULD THE MANUAL PRIMING LEVER RESIDE DURING NORMAL OPERATION?

In section 14-114 FUEL SYSTEM in the '92 service manual under MECHANICAL LIFT PUMP it states: "During vehicle operation the pump lever must be in the down position." Easy enough to understand.

Then: In section 14-134 FUEL SYSTEM - SERVICE PROCEEDURES (a few pages later) the manual states: "CAUTION: The lever must be returned to the locked position (pointing up) after priming." I assume this means while the vehicle is in operation once again. Is this conflicting information or I'm I missing something?

LOOKING FOR THE STRAIGHT ANSWER!

Thank you in advance..... KEENO

__________________
1992 W250 5spd. Repowered 5.9 Cummins w/ Bosch P7100 Injector Pump, HX-35 Turbo w/ 12cm2, Rebuilt Dana 70 w/3.54 gears, LSD, Quad 4X4 installed NVG4500HD Trans, SBC 13" CON-O, 3 1/2" JRE modified Banks Exhaust/Walker Muffler, Pyro/Boost, BHAF, 2" SJ frt. springs, 315/75R/16 BFG, Bushwacker Flares.

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