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Lifting and Loading Pay loaders, Fork lifts, tow motors, jacks and hoists.

Lifting and Loading

Forklift troubles. :(


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  #1  
Old 01-17-2009, 07:37:37 PM
Greg Shipley Greg Shipley is offline
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Angry Forklift troubles. :(

Bought a used Clark forklift, gasoline powered, 4 cyl flathead continental engine.
crankcase was full of gas, bad fuel pump, fixed that, filter, oil, had the carb rebuilt, all back together, carb floods,
took it off, floats loose, all seems well, put it back on, no gas this time at all.
took it off again, floats loose, all seems well, put it back on, floods, plugs get soaked with minimal cranking.
does not matter really where the jets are positioned either, it is a little zenith upgraft carb. Any ideas?
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Old 01-17-2009, 07:57:35 PM
Gene Williams Gene Williams is offline
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Default Re: Forklift troubles. :(

Sounds like the float is hanging up in the bowl. Maybe incorrectly adjusted or the wrong float?
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Old 01-17-2009, 08:27:40 PM
grub54891 grub54891 is offline
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Default Re: Forklift troubles. :(

It's possible that the float is hanging up on the bowl gasket.I'd check that next.Usually kind of hard to flood an updraft carb,but I've done it myself!How is the compression??
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Old 01-17-2009, 09:34:45 PM
Greg Shipley Greg Shipley is offline
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Default Re: Forklift troubles. :(

have not checked the compression, but there is alot of suck at the air intake of the carb with the air cleaner off.
One thing I forgot to mention, it first started and ran backwards for a few seconds, I adjusted timing for late and then the carb started flooding.
should these carbs have a rubber donut in the seat or is is metal on metal?
My spark is sort of weak, orange not blue I am putting new plugs and a coil on tomorrow as well.
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Old 01-18-2009, 09:37:09 AM
grub54891 grub54891 is offline
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Default Re: Forklift troubles. :(

I'd check compression just so ya know where you are at with the motor,also I'd tweak the timing back a little.If it's firing to late it'll do that.Does it have point's?may have to clean em up and replace condensor also.Let us know.....
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Old 01-18-2009, 09:51:02 AM
Ed Radtke Ed Radtke is offline
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Default Re: Forklift troubles. :(

condenser is your spark issue.The suggestions on the float sound correct.
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Old 01-18-2009, 11:06:26 AM
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Elden DuRand Elden DuRand is offline
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Default Re: Forklift troubles. :(

Could be that there is so much dirt in the fuel system that it's either plugged or, when the gob of crap breaks loose, it jams the float valve and makes the engine flood.

I agree that the condenser is most likely bad. Clean the points while you're in there.

Take care - Elden
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Old 01-19-2009, 12:24:44 AM
Greg Shipley Greg Shipley is offline
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Default Re: Forklift troubles. :(

just an update,
last night I took the carb apart and cleaned and inspected all parts, adjusted and bent the floats a bit as they would drag on the bowl.
Put a new set of plugs in this morning, and it started like it had been running 5 minutes earlier, ran nice all day.
I will put a condenser in when we get another warm day just as a precaution,
thanks for all the help.
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Old 01-19-2009, 11:06:25 AM
Greg Shipley Greg Shipley is offline
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Default Re: Forklift troubles. :(

one additional question,
anyone know what oil weight this continental engine should have in it?
straight weight 30?
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Old 06-10-2012, 01:39:30 PM
dwlee6vn dwlee6vn is offline
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Default Re: Forklift troubles. :(

Took the plunge and bought an old Clark forklift. Need help with identification and a few questions. Photos attached. Looks like a “Carloader” from comparison to photos saw posted on web. Has 4 cylinder flathead? gas engine looks like original paint on engine is medium blue. Seems to run well. Seller said it was 3500 lb capacity, but don’t think they knew anything about forklifts beyond what who they bought it from told them. I worked as a ASE certified auto tech for a few years back in the 70’s and have pretty good mechanical knowledge overhauling engines, transmissions, machinery, electric motors etc., but this is my first forklift.

Questions:

SERIAL NUMBER LOCATION FOR ID
I read somewhere serial number was on frame, someone posted was :”under battery” which looks to be in original carrier on right side inside the access door. Took out battery and took a quick look, did not find anything under the accumulated crud in that area. Before I scrape too much, am I looking in the correct place?

BRAKES
When I got it home, the brake pedal did nothing – went to floorboard with no resistance or braking action. Looked in master cylinder and it was about ˝ full of fluid. That was yesterday. Today I went out in garage and pumped the brake pedal a bunch of times, and now it has resistance, firm not spongy near the top of it’s travel. Did not have room or time to start it up and move it, but I could hear something moving inside the right front wheel when I pressed on the brake pedal and I put the machine in neutral and rocked it fore and aft a little with a 2x4 and pressing the brake pedal stopped me being able to rock it, so maybe the brakes do work? I’m not one for fixing it if it ain’t broke so will add some brake fluid and try things out when I get some time. Any ideas on why no pedal yesterday, OK today?

HYDRAULIC OIL MILKY COLOR
The oil in the hydraulic tank which is in front of the motor, sort of under the front of the seat looks milky. Photo attached shows a bit of it running down the outside of the tank that dripped off a dipstick I stuck in to check the level. Any idea why it is this color? How high in the tank is the level supposed to be, and what oil to use? Can I get the 5 gallon pail of tractor hydraulic fluid/trans fluid and use that? How about automotive automatic transmission fluid? The lift seems to work OK and it has no major leaks, the lift cylinder area especially is dry. The little bit it does leak somewhere leaves a few drips on the floor at right front of the machine, maybe a few inches overnight. The radiator coolant looks clear light green like someone did use an antifreeze mix in it, so there does not appear to be comingling of coolant, though I don’t even think these systems are interconnected anywhere.

ENGINE OIL DIPSTICK
Where is the engine oil dipstick and any idea how much oil goes in the motor and oil filter part numbers?

STEERING
The unit has about 1/3 of a turn free play in the steering. Have not looked underneath to see where the play is – probably stack up of all linkages and box. Is this “normal” for a machine this age? Any suggestions where to look first?
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