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    JCB 320T Parts Book

    I'm looking for a source for a parts manual, JCB 320T tracked model. I'd prefer a hard copy but will consider a readable .pdf file. JCB isn't known for customer access to self help. Ideas? Thanks
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    Hitachi EX Hydraulic Pump Control Problems

    Thanks, I'll let you know how it turns out when I get the new part.
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    Hitachi EX Hydraulic Pump Control Problems

    I checked the A-sensor harness as you described and got 4.99 volts. My plan is to order a new A-sensor and tap wires into the terminal 1 & 3 so I can adjust to the 4.4 volts. I traded out the P-sensor with no change. I'll get the new valve solenoids, A-sensor, and N-sensor installed and...
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    Hitachi EX Hydraulic Pump Control Problems

    Both control modules blink regularly on a one second interval. Batteries good. I'll check voltage output at alternator to confirm output. I don't have the ST7139 harness to intersect the voltage reading at the A-sensor harness. Which of the prongs on the machine harness are used to find the 4.4...
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    Hitachi EX Hydraulic Pump Control Problems

    Thanks for the info. I don't know the history on this machine. With all these sensor failing, I'm questioning whether a voltage spike occurred somewhere along the way? The EC motor control & sensor have also failed & currently are replaced with a hand throttle. Will the lack of feedback from the...
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    Hitachi EX Hydraulic Pump Control Problems

    I have a EX100-3 with a classic slow pump control situation. It starts with everything operating at about 50% speed and gradually slows down to dead slow. I've checked the wiring and the control modules are both blinking red. The engine is operating fine and in checking the pump pressure, I get...
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    Hitachi EX100-3 slow hydraulics

    The hydraulic functions in this machine operate fair when cold but slow down dramatically as the system warms up. If this happens there's a reference in the operators manual to rotating the lower cover on the hydraulic pump and setting the Pump Swash Angle. I've attached the pages from the...
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    Hitachi EX100-3 Electric Relay Questions

    I have a schematic for a 120-3 which shows layout as you've stated. I was looking at the "official" CD manual provided by the dealer for the EX100-3. Looking back I see that the wiring diagrams in that CD are for a EX60-3, so that might be the discrepancy. As to the relay, I'm going to hot...
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    Hitachi EX100-3 Electric Relay Questions

    On the EX100-3 wiring diagram the EC Motor Relay should have constant 24V power at #1 & 3 contacts of the relay. I have voltage at the 5 amp fuse but nothing at the relay. Is there a switched routing I'm missing or a potential break in the wiring? My EC motor isn't working. Can someone provide...
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    Hitachi EX Electrical Problem

    Well damn, I have a bad voltage meter. Put another one on and now it registers 25V. Sorry for the confusion. My next step is to see if stop motor and EC motor works.
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    Hitachi EX Electrical Problem

    Thanks, will check these units. But, in order for the alternator to create high voltage the engine would need to be running. All these indications are made with the key on but engine NOT started. Am I missing something?
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    Hitachi EX Electrical Problem

    I have a EX100-3 with some electrical issues. The engine stop quit working and in checking I found that there was no voltage at the (B) power circuit to the motor. Attached is a diagram of the system. I found some corrosion at the main terminal block between the inner and outer wiring harness...
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    Hitachi 120-2 questions and anwsers

    Thanks for your response. So far by jamming a screw driver between the pump throttle shaft & stop to speed up the engine, I seem to have proper hydraulic operation. Is the conversion kit mainly to replace the computer signals that maintain the proper pump stroke during a load and nothing about...
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    Hitachi 120-2 questions and anwsers

    I just got a EX100-3 that may need the conversion kit but I haven't done any of the diagnostics yet. There is NO electrical control of the throttle and to even start it and I need to hold the pump throttle control with a wedge to set the speed. I ALSO HAVE ONE OTHER ISSUE I HAVEN'T HEARD ABOUT...
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    JCB 320T Track Skid Loader-Hydraulic Leak

    I have a JCB 320T with a hydraulic oil leak under the plastic hydraulic tank. I will need to remove the tank to locate the leak. The JCB service manual is worthless and a service request to the factory provided nothing. Has anyone removed the hydraulic tank in this class of skid loader? Anyone...
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    JCB Auxiliary Hydraulics

    I purchased a JCB 320T with hi-flo auxiliary hydraulics. Is the auxiliary hydraulic circuit a closed center or open center system? Thanks
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    Hitachi 120-5 : Auxiliary circuit pressure relief

    I have a EX120-5 with a auxiliary circuit for a thumb, hammer, etc. I need to lower the operating pressure for this circuit to 2500 psi. I've done this on a Ex120-2 machine and it's straightforward. The control valve on the -5 models is different. I thought I located the relief adjuster on the...
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    Hitachi EX120 "Grey Market Machine" Parts Help

    I've learned a bit since I originally made this post. I've owned a -2, -3, and a -5 machine. Now there are several options to find parts. Don't bother with a dealer, if they can't plug a computer into it they're not interested. Sad state of modern mechanics and machines. There are operators...
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    Hitachi EX120-5 Pattern Control Changer

    I have a grey market EX120-5 with a 4 position Kawasaki brand pattern control changer installed. Position "Y" is standard "Cat" control but the other three K,M,H are Asian standards we don't see in North America. I would like to modify it so one of the positions is "John Deere" style. Is anyone...
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    Hitachi EX120 Aux Hydraulics

    I'm looking at a Hitachi EX120-2 machine. It was built without a auxiliary circuit or valve to operate a thumb, etc. Other than buying a valve to add to the valve bank, are there any other issues to deal with? I'm expecting to need a valve, steel piping from the valve, misc. hoses for pilot...
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