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Discussion Forum

WD45 transmission and rear fluid

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Ed Weber

10-04-2002 09:39:26

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Hi can anybody tell me what is the name and type of fluid that you can use for the hydralics and the rear drive . my seals are leaking between the two and I want to use the common fluid so it wont hurt anything. also the fill on the hydralics is lower than the dipstick, how do you get a accurate dipstick reading without filling at the dipstick? any help would be appreacited. thanks Ed Weber

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10-06-2002 10:39:52

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 Re: WD45 transmission and rear fluid in reply to Ed Weber, 10-04-2002 09:39:26  
The OPERATOR'S manual for the WD45 calls for two separate fluids- for good reason. If the seal is out, it should be replaced. If you replace the seal so that fluids do not commingle and equalize, you will get an accurate reading at the hydraulic fill dipstick. These are not today's tractors that use a common fluid for transmission, hydraulics, and rear end. If you intend to 'save' money now, you'll pay for it down the road.

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Gordon in IN

10-05-2002 08:34:09

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 Re: WD45 transmission and rear fluid in reply to Ed Weber, 10-04-2002 09:39:26  
From the "AC Operating Instructions" (Manual): "Hydraulic Pump - Oil used in the hydraulic pump must not foam. Check daily and keep filled to high mark on bayonet gague with rams extended. ..... Change oil and clean magnetic plug twice a year." Recommended oil is: "Above 45 degrees F, use SAE 20W; Below 45 degrees use SAE 10W." "Final drives, transmission, differential and transmission clutch .....use SAE 80EP all year" "Oil sump - Capacity 6 quarts .....
Above 90 deg. F, use SAE 40W
Above 32 deg. F, use SAE 30W
Above 10 deg. F, use SAE 20W Below 10 deg. F, use SAE 10W"
My suggestions: Realizing that the Manual was written before the availability or wide spread use of "detergent motor oils" and "multi-viscosity motor oils or gear lubes", I suggest the following:
For the Hydraulic pump - Non-Detergent SAE 10W oil (when this oil is not available I have used Dexron III ATF with good results) The 20W oil works very slow, sluggish and poorly at low temperatures in my tractor. I use the 10W all year. If you were to use the SAE 80W Gear Lube in the hydraulic pump I do not think it would work at all and may damage the pump. (The pump is a PISTON type pump driven by cams not a GEAR type pump as in some other tractor hydraulic systems.)
For the transmission - SAE 80W-90 GL5 Gear Lube (better protection at high temperature, same cold weather performance).
For the final drives - SAE 80W-140 GL5 or SAE 90W-140 GL5, same reason as above.
For the engine: SAE 10W-40 SI/SJ or SAE 10W-40 Synthetic oil (such as Mobile I) all year for better protection at all temperatures.
I do not think that using the same Gear Lube in the hydraulic system will work and may damage your pump. I think you will probably have to replace any bad or leaking seals. Hope this helps, Gordon

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Dave Grubb

10-04-2002 12:57:18

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 Re: WD45 transmission and rear fluid in reply to Ed Weber, 10-04-2002 09:39:26  
There are 3 filler points on the left side of the tractor. The forward point filler is a finger twist off cap with a dip stick attached. This is for the hydraulics system and is serviced with engine oil or any fluid labeled for hydraulics or wet brake systems: do not use ATF though. The next filler port back is square headed pipe plug. This is the filler port for the transmission and is serviced 80w140 or 80w90 gear lube. The last filler port is a square pipe plug also and is for the rear end/differential and is serviced with the same gear lube as the transmission. The hydraulic fluid is not interchangable with the gear lube.

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10-04-2002 17:58:12

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 Re: Re: WD45 transmission and rear fluid in reply to Dave Grubb, 10-04-2002 12:57:18  
Unless you use "tractor lube" which is an all purpose lube for power steering, hydraulics, transmissions, etc. NAPA has it as does Wal Mart.

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Ed Weber

10-05-2002 06:26:37

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 Re: Re: Re: WD45 transmission and rear fluid in reply to Tom, 10-04-2002 17:58:12  
thanks alot for the imfo. Ed

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