pulled the cap off yesterday, i didn't see any flow...guess that's why my rear was sagging...i was pulling a trailer. the fluid level is full. today the rear seemed level, but i dropped the trailer last night. I wounder if the pump is shot?

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1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5

Try starting the car and then have to adults sit in the back with the rear open and your feet on the ground. You can feel the rear lift, that is if the pump it working. If nothing happens then your fluid is low or the pump isn't doing it's job.

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Hi, I'm new here, but i've been reading this forum since I have my W123 300TD. I am also sorry, if a similar problem has been discussed before.

The thing is - I have changed both the accumulators and the SLS valve (a tested used one) - my car does rise up as it should and the ride is not hard, nor bouncy - the only problem is that it sags overnight.

The symptom, which I find uncommon, is that after the engine is turned off - I can hear a noise of something loosing pressure - like a tire deflating - could this mean that everything is working fine, only there is a loose connection in the system?

I just wanted to make sure, before rebuilding the pump/changing springs/struts. Maybe you could advice on the next step.

Many thanks.

The hydraulic shocks come to mind. Do you notice any moisture/leaks around the spring perches?

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter

Valve rebuild. Cheap and relatively easy.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Biodiesel300TD {Andrew} sells rebuild kits for the W123 300TD, with instructions. And pictures!! I've purchased 4 from him I believe.
A great person to do business with!!! Have no fear!

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Thanks, guys.

I'm guessing, that it could be the struts, but since those are so expensive, I'll do a valve rebuild.