MarshallPowerGen
Senior Member
- Joined
- Nov 26, 2017
- Messages
- 452
- Location
- Northwestern USA
- Occupation
- Generator Technician & Equipment Mechanic
Well, since my last thread on the Deere 4024 went so well, I figured I'd ask about the next headscratcher that came into the shop.
4840 Skidsteer with a Deutz F4M-2011 air cooled diesel, Hobbs shows 8800 hrs. Engine fires right up, and within the first few seconds starts to lope/hunt up to about half throttle, then smooths out. Does this until it warms up, then the lope goes away and runs like normal. It's identical to this thread (that was never finished).
https://www.heavyequipmentforums.com/threads/gehl-5640-engine-lope.68603/
Already found and replaced a clogged inline fuel filter and the water separator, checked fuel pressure which was around 8-9 PSI when loping, and smooths out when idled up and showing 11psi, so replaced the fuel lift pump since it was original (with no primer or screen cover plate) and not having a manual with the specs. Tested the oil thermostat in the filter housing and ran an overhead, but with no change.
Curious what the next spot to start looking would be, or any info on governor adjustment (or if anyone out there has a Workshop/Service manual for these engines). Not a lot of info online it seems...
Thanks in advance folks!
4840 Skidsteer with a Deutz F4M-2011 air cooled diesel, Hobbs shows 8800 hrs. Engine fires right up, and within the first few seconds starts to lope/hunt up to about half throttle, then smooths out. Does this until it warms up, then the lope goes away and runs like normal. It's identical to this thread (that was never finished).
https://www.heavyequipmentforums.com/threads/gehl-5640-engine-lope.68603/
Already found and replaced a clogged inline fuel filter and the water separator, checked fuel pressure which was around 8-9 PSI when loping, and smooths out when idled up and showing 11psi, so replaced the fuel lift pump since it was original (with no primer or screen cover plate) and not having a manual with the specs. Tested the oil thermostat in the filter housing and ran an overhead, but with no change.
Curious what the next spot to start looking would be, or any info on governor adjustment (or if anyone out there has a Workshop/Service manual for these engines). Not a lot of info online it seems...
Thanks in advance folks!