I purchased a Yale forklift in December for my farm - Model GLP050RENUAF089. It has the Mazda propane engine. When I first start the machine and shift to forward or reverse there is no response - cant feel the clutch packs engaging. If I let is idle for a few minutes eventually I will start to feel a small jerk as the clutches engage when I shift into gear but still not much movement when I push on the accelerator. If I keep shifting back and forth between forward and reverse and rev the engine it will start to move better till eventually after a few more minutes if seems to shift into gear and drive OK. I only used it over the last 3 month for a few small lifts inside my workshop - too cold and snowy to go outside - once I got it moving seemed to work OK for the short time I used it. We have had real nice weather this week so yesterday I used it outside for 20 minutes or so to move some pallets and after running it for that length of time the transmission seemed to start to slip so I put it away.

I am not very knowledgeable on transmissions but it seems to me like the transmission pump isn't providing enough flow or pressure when the machine is first started. I am going to try and check the transmission pressures but so far I haven't located the test port locations - they don't seem to be where they are shown in my manual. Going to give the transmission valve area a good pressure wash this weekend now that it is warmer and see if I can find the pressure test connections.

In the meantime I pulled the 2 transmission oil cooler hoses off of the radiator this afternoon to see if there was oil flow. I started it cold and as usual could not feel the clutches engaging at first and no oil was coming out of the hoses in forward, reverse or neutral. I let it run for 5 minutes and at that point I could feel a slight jerk in the drivetrain when I shifted into gear but still no oil out of the hoses. I tried revving up the engine and I did get a little but of movement when shifting into forward or reverse and a small dribble of oil coming out the end of one hose - the end of it was about the same height as the top of the transmission case. When I shifted into neutral the oil level in the end of the hose dropped out of sight even when revving the engine.

I would appreciate if anyone familiar with the transmission operation on this type of machine could comment if the oil flow ( or lack of flow) in the transmission cooler hose sounds normal