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Recent content by smolar

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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    UPDATE: The stuttering was a loose drive belt and not hydraulic. I fixed the Chaincase leak by correctly plumbing the new drive motors (2 high pressure ports, 2 low pressure case drains; one is some kind of hot-shuttle port with an OEM 65 psi pressure relief valve that I took off the old...
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    Okay, I'm back. The problem now is Drive motor stuttering / insufficient power/torque. Here's the post I tried to put on a facebook group, but I'm cross-posting here -- little more details about the machine, etc,. I have an older Bobcat 7753 (Essentially a vertical lift 753 as I understand...
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    Thank you all so much for your help - I am happy to report that after installing the O rings (and then doing it a second time to torque those fitting down HARD - 60ft lbs is what I found online ) and fingers crossed I have not had any more spraying or chain case leaks! Now I need to deep clean...
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    D’oh! Thank you so much! This is exactly what I needed to know. I just ordered the o ring boss kit (buna hardness 90) and will get them all replaced.
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    Okay I am back. I ordered and installed two new final drive motors (OFF BRAND because of parts availability but they seem to work just fine) -- Machine appears to have plenty of power; I used it for 30 minutes and noticed oil leaking. The O rings (at least 1, maybe more) on the high pressure...
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    thanks so much for the replies - I will do some testing on the motors and see what I find // take them to be tested by a hydraulic shop. Appreciate it a ton.
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    Bobcat 7753 dumping hydraulic oil into chaincase ONLY under heavy load – carrier seals done, case drain filters replaced, stumped

    Hey all — first time skid steer owner here and I’m getting pretty discouraged, hoping someone can point me in the right direction. I recently bought an old Bobcat 7753 super cheap. Overall the machine was actually working well (drive, lift, tilt). BOSS system is toast and bypassed (it was...
    • smolar
    • Thread
    • bobcat case drain chaincase
    • Replies: 14
    • Forum: Skid Steers
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    Bobcat 753 BOSS system removal

    How's the machine working out? I have a 7753 with the BOSS system, still hooked up (somewhat) but non functioning. Beeps constantly and I have no aux controls or display. I am putting together a list of how to replace it, especially regarding the aux hydraulics. Did you do something similar...
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