scso1502
Member
- Joined
- Aug 6, 2023
- Messages
- 5
- Location
- Stevensville, MT. USA
- Occupation
- Retired Deputy Sheriff / Equipment Operator/Mechanic
Hello,
I'm helping a buddy work on a hydraulic issue with his Crown logging self-loader. The model of the loader might be a 25001, but that's unconfirmed. I've attached a picture of the loader.
The issue he has is the hydraulic lines and cylinders get very hot and it loses lifting power after about 30 minutes of loading logs. The other thing that is happening when the system gets hot is that the loader's turret wants to move to the right on its own while the operator is lifting the load. To comensate for this, the operator must apply left power on the turret to keep it from moving to the right, which further reduces the liftng power of the loading boom. I'm wondering is anyone can give us some help in identifying what the problem might be?
So far we've:
1. Replaced all 4 hydraulic oil filters
2. Drained and replaced the loader's hydraulic oil and replaced it to capacity with 50 gallons of new AW-32 hydraulic oil
3. Rebuilt a leaky boom extention cylinder that was bypassing and leaking-off causing it not to hold in the position it was left in
4. Replaced and/or tightened any the leaky hydraulic hoses and made sure there are no visible hydraulic system oil leaks
Doing the above definately improved things and gave the loader more power that lasted longer. The cylinder we rebuilt no longer drops from slowly bleeding off as it seems to be working well. However, we still can't get a full load of logs on the truck before the loader hydraulics get too hot and lose power to the poing we can't get logs high enought to drop them into the bunks.
The owner of the truck thinks the hydraulic oil is bypassing somewhere like at a relief valve that is out of adjustment or stuck partially open. The problem is he doesn't know exactly where to look for the problem. Having a schematic of the hydraulic system would help we don't have anything like that and can't find anythng online either. We may just need to trace out the hoses and see if we can find out where the problem might be, but if anyone has experienced something like this on a log loader, you thoughts on what the issue could be or if there are any adjustments that need to be made to resolve the isse, we would really appreciate the help.
Many thanks and take care,
Mike Vail
Stevensville, MT. USA
I'm helping a buddy work on a hydraulic issue with his Crown logging self-loader. The model of the loader might be a 25001, but that's unconfirmed. I've attached a picture of the loader.
The issue he has is the hydraulic lines and cylinders get very hot and it loses lifting power after about 30 minutes of loading logs. The other thing that is happening when the system gets hot is that the loader's turret wants to move to the right on its own while the operator is lifting the load. To comensate for this, the operator must apply left power on the turret to keep it from moving to the right, which further reduces the liftng power of the loading boom. I'm wondering is anyone can give us some help in identifying what the problem might be?
So far we've:
1. Replaced all 4 hydraulic oil filters
2. Drained and replaced the loader's hydraulic oil and replaced it to capacity with 50 gallons of new AW-32 hydraulic oil
3. Rebuilt a leaky boom extention cylinder that was bypassing and leaking-off causing it not to hold in the position it was left in
4. Replaced and/or tightened any the leaky hydraulic hoses and made sure there are no visible hydraulic system oil leaks
Doing the above definately improved things and gave the loader more power that lasted longer. The cylinder we rebuilt no longer drops from slowly bleeding off as it seems to be working well. However, we still can't get a full load of logs on the truck before the loader hydraulics get too hot and lose power to the poing we can't get logs high enought to drop them into the bunks.
The owner of the truck thinks the hydraulic oil is bypassing somewhere like at a relief valve that is out of adjustment or stuck partially open. The problem is he doesn't know exactly where to look for the problem. Having a schematic of the hydraulic system would help we don't have anything like that and can't find anythng online either. We may just need to trace out the hoses and see if we can find out where the problem might be, but if anyone has experienced something like this on a log loader, you thoughts on what the issue could be or if there are any adjustments that need to be made to resolve the isse, we would really appreciate the help.
Many thanks and take care,
Mike Vail
Stevensville, MT. USA