I blew a hydraulic hose on my ctl. After replacing the hose and adding the necessary hydraulic oil, I'm experiencing different issues. First off, my joystick control is reversed (joystick forward/backward moves machine left/right, joystick left/right moves machine forward/backward). However, raising, lowering, and tilting are as normal. Secondly, if I attempt to move the machine, even with the wacky controls, it stops after a minute and the the driver alert and engine condition indicator lights illuminate and flash. Again, prior to blowing the hydraulic hose everything was operating fine. Any suggestions would be greatly appreciated. I consulted a tech at the dealership and verified that I do not have hydraulic hoses crossed somewhere on the pump. Thanks!
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CAT 289C2 Hydraulic/Steering Issue
- Thread starter dpiper
- Start date
I should also mention that when I have been attempting to move the machine, the cab is lowered, but not bolted back down. I wanted to be able to raise the cab and check for any leaks. Could some safety sensors be causing the lights to illuminate?
Chrisso
Senior Member
What's your s/n? Is it RTD***** ? If it isn't, disregard everything I'm about to say.
Which hydraulic hose blew? Were electrical connectors on the hydrostatic pump solenoids removed to get the hose out? If so, a couple of them are back to front.
LH joystick movements are just inputs to the machine ECM. The 4 solenoids sitting on top of the main hydrostatic pump are just outputs from the machine ECM, and tell the pump what to do. Something here is connected up wrong I'm guessing.
As for the machine stopping dead after a minute, sounds like just resulting unexpected motor speed detection, which just cuts the hydrostatic system when sensing the hyd motors not reacting as per the inputs.
Which hydraulic hose blew? Were electrical connectors on the hydrostatic pump solenoids removed to get the hose out? If so, a couple of them are back to front.
LH joystick movements are just inputs to the machine ECM. The 4 solenoids sitting on top of the main hydrostatic pump are just outputs from the machine ECM, and tell the pump what to do. Something here is connected up wrong I'm guessing.
As for the machine stopping dead after a minute, sounds like just resulting unexpected motor speed detection, which just cuts the hydrostatic system when sensing the hyd motors not reacting as per the inputs.
One of the big hoses to the left track. No, none of the electrical connectors were removed when completing the repair. I am going to double check all connectors to make sure nothing came loose in the process of everything. Thanks for your insight on the matter.
Nige
Senior Member
As Chrisso stated above the machine stopping after a minute with the alerts, etc, is likely due to the funky response to the controls. The ECM sees an input to move the machine in one direction from the joystick but detects movement in the opposite direction from the speed sensor in the final drives. That in itself is enough to generate a Diagnostic Code for “machine movement does not correspond to joystick input” or something along those lines.
You might need an electrical schematic to check that the hydrostat pump solenoids are connected correctly. To locate the right schematic would require the machine Serial Number.
You might need an electrical schematic to check that the hydrostat pump solenoids are connected correctly. To locate the right schematic would require the machine Serial Number.
CAT 289C2 (s/n RTD01369)
What has me so puzzled is nothing electrical was disconnected during the repair. If something was damaged when the hose blew, or coincidentally shot craps at the same time, I’d think I’d lose controls rather than have them reversed. I appreciate your help and willingness to share knowledge.
What has me so puzzled is nothing electrical was disconnected during the repair. If something was damaged when the hose blew, or coincidentally shot craps at the same time, I’d think I’d lose controls rather than have them reversed. I appreciate your help and willingness to share knowledge.
heymccall
Senior Member
If it was a drive hose, could you have reversed the A & B hoses to that drive motor?
You know, disconnected the good hose to access the failed one, then connected them opposite.
Swapping the A & B hoses to one motor would present your symptoms.
You know, disconnected the good hose to access the failed one, then connected them opposite.
Swapping the A & B hoses to one motor would present your symptoms.
heymccall
Senior Member
Forward stick should put both motors to ahead travel, but....
If you transposed the hoses on the Left drive, Forward stick would reverse the left motor while leaving the right in ahead, resulting in Forward stick causing the left turn.
And stick Left would cause straight.
If you transposed the hoses on the Left drive, Forward stick would reverse the left motor while leaving the right in ahead, resulting in Forward stick causing the left turn.
And stick Left would cause straight.
heymccall
Senior Member
#12 hoses (2) are same. I suspect (strongly) that you transposed them.
It was a drive hose, and what you're suggesting was my first inclination as well. However, when I called the dealer the tech described the hose layout as such, if facing the machine in front with cab lifted:
top front hose -> right track
top rear hose -> left track
bottom front hose -> right track
bottom rear hose -> left track
Is this not correct? I know he changed his mind at one point when he was confused between C and D machines. I have a 289C2.
I'll check my hoses again and reference your diagram. Thanks!
top front hose -> right track
top rear hose -> left track
bottom front hose -> right track
bottom rear hose -> left track
Is this not correct? I know he changed his mind at one point when he was confused between C and D machines. I have a 289C2.
I'll check my hoses again and reference your diagram. Thanks!
heymccall
Senior Member
My drawings are from a C2 machine.
Logic tells me that you transposed both #12 (in the drawing) hoses on the left hand side of the machine, whether at the motor or the pump. All of your symptoms point there, as well as your affirmation of how the events transpired.
Logic tells me that you transposed both #12 (in the drawing) hoses on the left hand side of the machine, whether at the motor or the pump. All of your symptoms point there, as well as your affirmation of how the events transpired.
heymccall
Senior Member
Actually, stick forward wouldn't be just left turn, but rather rotation CCW of the whole machine when viewed from above (right motor FWD and left motor REV).
Heymccall you were correct. I had the two hoses that feed the right track swapped. I removed them and reattached in the correct spot, joystick is back to normal. I wasn’t able to run it to see if that also took care of my warning lights coming on.Thanks so much for everyone’s help!
Chrisso
Senior Member
I can see where the confusion came in. Thanks for reporting back and glad you got it sorted.