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09-19-2003, 03:22 AM
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#1 |
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go bucks!
Join Date: Jan 2002
Location: MIAMISBURG OHIO USA
Posts: 803
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?? about rear pumpkin
was underneath my 86 c/20 lookin' at the wireing for my trailer hitch and i noticed a funny looking contraption that has some sort of a lever attached to the top-side of the pumpkin's housing......it has 2 hard lines attached to it almost resembling brake lines type of lines w/ the armour spiral protective shielding....was kinda late and i did'nt bother to trace down the lines and where they go to....what in the blazes is this?? i bought this truck from an old couple who used it to pull thier fifth wheel travel trailer......the lever is attached to a bearing of some sort that pivot's along the lever's arm.anyone got any idear's??
 sorry to sound so vague in the description....sound like a dduuuhhhh......!!
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'68 swb 1/2t 350/350th '86 lngbd 3/4 TON parts getter '49 gmc 1/2 t 5 window 350/350th '96 gmc sonoma sle ext-cab. hey it's a 4cyl. 5 spd and good on gas y'know? |
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09-19-2003, 09:31 AM
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#2 |
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Registered User
Join Date: Oct 2002
Location: LAS VEGAS, NV.
Posts: 157
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pumpkin
it is the proportioning valve to the rear brakes. as the weight transfers to the front of the truck the bed tends to rise on hard braking, the lever proportions brake fluid to the rear brakes to keep them from locking up.
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troy wilson |
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09-19-2003, 09:38 AM
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#3 |
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Happy to be here
 
Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Ding-ding-ding! We have a winner! TROYLV has the correct answer.
The rest of the story is, they often malfunction and leave you with little braking power in the rear. If you rear brakes don't seem right, give this unit a look...
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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09-19-2003, 01:41 PM
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#4 |
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go bucks!
Join Date: Jan 2002
Location: MIAMISBURG OHIO USA
Posts: 803
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well, i'll be ding-danged...... didn't even know they existed.....learn somethin new every day!!!thanks guys!
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'68 swb 1/2t 350/350th '86 lngbd 3/4 TON parts getter '49 gmc 1/2 t 5 window 350/350th '96 gmc sonoma sle ext-cab. hey it's a 4cyl. 5 spd and good on gas y'know? |
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09-19-2003, 02:29 PM
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#5 |
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Registered User
Join Date: Mar 2003
Location: Walker, LA
Posts: 2,925
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These are not on all trucks...right? I don't think my 1/2 ton has one or I've never seen it.
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Gary -1986 SWB: lowered 4/6, SOLD!!! -Best 1/4 mile: 14.51 @ 91.01 MPH -2001 Pewter Tahoe, billet grill, Corsa Sport Cat-back, K&N FIPK SOLD!!! -2004 Z-71 Extended cab with a flowmaster, BDS 6.5", 3" BL, 35x12.5x18 Trail Grapplers on Pro-Comp 18x9 wheels |
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09-19-2003, 06:30 PM
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#6 |
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I'm back with 2nd truck!
Join Date: Feb 2002
Location: Texas
Posts: 3,775
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HOw do you fix/replace these? I think I need to replace/fix mine.
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1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson |
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