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Thread: Ongoing Log Of My 1987 HMMWV

  1. #61
    Colonel Milcommoguy's Avatar
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    DIY alignments

    When I got my rig squared up it was time to work in an alignment. To pay for one, no problem. I use my allowance LOL for parts not procedures. As it goes, it a hobby rig and a learning platform AND it keeps me out of the way for honey doo's. (someone thinks it's a money pit)

    No guarantees here, but it worked for me. Thousand miles later, spot on. Balanced tire wear, no cupping, hopping, steering tracks nice, no wiggle / wobbles, no out of pocket $$. Simple tools, square, some string, good tape measure, protractor, straight edge (12 foot angle iron) patience and some band-aids. Well it is a HumV LOL. For the REAL breakdown see the TM's

    Since my needs are reliability, highway safe, better than parade ready, camping, desert off road travel, trailer to the dump, weekend kick' it... and who loads them up to payload capacity? It was time to get to it.

    Shims IMG_7393.jpg Piano keys.

    Rear shims placement is easy (per wheel) to set camber. All the nuts and bolt can be a pain.

    The way I did it was to pull all the shims, (wheel at a time, as I work alone) replace cup bolts with standard nuts (easier to spin with me fingers for test) Put truck back on the ground.

    Then with a prying tool, wedge, flat blade, etc. working it between cup and frame. You can easily open or close the gap / spacing to get the desired shims thickness needed. If your tires are new, one thin shim will change the stance. You can see the results in real time. Measure the gap, size up the shims, slap them in, replace nuts to top locks and torque. Know there are thick and thin ones.

    They hang on the top bolts and if lucky can be slipped in and out. There may be a thick one (backing plate) that is held in place by the bolt which needs to be backed out to remove, Guess they could fall out??

    Front
    a bit harder with interaction with camber / castor, but basically the same. If you look at the upper control arm and mounting location of shim placement will shift the pivot-line (castor) between the ball joints. Between the two shim positions, front and rear (likely not the same) you should be able to walk thru a range of camber /castor setting, hitting the specification. measure the gap, replace with = shims (unless something is wack)

    Toe-out
    on the rear another simple measurement. It can get a bit squirrel-ly if the wheels aren't squared / parallel to the thrust lines (down the center full time HumV) to start with. If not, excessive tire wear when trying to head straight, rear end crabbing left or right. Think four wheel steering.

    Toe-in
    on the front is a bit tricky, as to which way is straight ahead. Steering box left to right to the stops, find the center and lock steering wheel down. Are wheels really tracking straight ahead?? DO NOT allow steering wheel to turn from this point on or you will be chasing your tail. Any loose joints or sloppy steering box is a deal breaker. Keep those tie rod clamp nuts and bolts near the wheels on the forward side of the wheel when done.

    The big deal here (TM) is that tie rods pivot ends have about the same thread count left / right wheels. Make your measurements, adjusting to keep the balance of tie rods lengths and heading true straight, see above DO NOT.

    As an added bonus... the steering wheel spoke should be pointed straight down (TM). It's an indexing thing, don't worry, most never are. Personal preference up, down, sideways, somewhere in between ?? Easy fix (note: it's not at the wheel)

    Watch after removing shims that you have enough threads to pull it all together to torque specs. If you pull the backing plate with four holes to get spec. (rare) put it on the inside of frame and note something is wack.

    Refresher > https://www.tirerack.com/tires/tiret...e.jsp?techid=4 <

    Work safety and hydrate. UPS just show up with the T-case seals. Back to playing.

    Hobby HUMMWV alignment. In the driveway, at home. Save money too, CAMO
    Last edited by Milcommoguy; 09-19-2019 at 19:19.

  2. #62
    Colonel Milcommoguy's Avatar
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    Opps. Didn't mean to hijack your thread TOBASH. Your getting ready for the winter. Send it over to "What have you done or ??

    Sorry, CAMO

  3. #63
    3 Star General TOBASH's Avatar
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    Quote Originally Posted by Milcommoguy View Post
    Opps. Didn't mean to hijack your thread TOBASH. Your getting ready for the winter. Send it over to "What have you done or ??

    Sorry, CAMO
    No worries. This was not a hijack and it was very informative.

    Thanks for the info.

    Best,

    T

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    3 Star General TOBASH's Avatar
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    Windshield wipers work but driver's side wiper is loose, and water pump is not pumping fluid.

    Most concerned about water. What should I check first?

    If wipers get power, can I assume pump gets power, or are they separately powered?

    Best,

    T
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

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    4 Star General juanprado's Avatar
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    Quote Originally Posted by TOBASH View Post
    Windshield wipers work but driver's side wiper is loose, and water pump is not pumping fluid.

    Most concerned about water. What should I check first?

    If wipers get power, can I assume pump gets power, or are they separately powered?

    Best,

    T
    Pump is in bottle and seperate power circuit. Common failure item. Oem is stupid crazy in price for a squirter. I used a 24v Asian pump off a truck. Check my Thread for part #
    1984 M923 "Maj. Zippidy" who now is equipped like a M925A1
    1991 M998 HMMWV

    1990 Kasel M101A2
    1968 Case Master M101A1 with fuel tank and gen set up
    1991 Eastern Technologies M105A2
    60's ? m116a1? radar trailer flatbed
    xm1073 flat bed 7 1/2 ton


    "Success demands a high level of logistical and organizational competence."
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  7. #66
    3 Star General TOBASH's Avatar
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    OK Juan Thanks. I will look into that and order one.

    Now the dashboard is my next big thing, because without idiot lights and idiot gauges I can get into trouble.

    Right side light works. Left does not. High beam light bulb indicator in the dash works.

    None of the electric gauges work. Oil flickers almost 1mm movement when I turn the truck on. I disconnected batteries and then removes screws holding gauge panel in place. I saw some ground wires to the upper left of the dash and I loosened and tightened back down, but not change. All wires are plugged in and all nuts tightened.

    Only other idea I have before I begin looking at the sender units is dielectric grease to all connections.

    Because 1 light works, some electricity is getting to at least part of the darned thing.

    Ideas?
    Last edited by TOBASH; 09-21-2019 at 20:29.
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

    1987 M1025 Slantback, 6.2 w/3 speed
    2017 Tesla Model X P100D
    2011 Tesla Roadster
    2003 Lifted Durango with steel bumpers
    1984 Toyota BJ-44 RHD
    Restoring 1975 Toyota Iron Pig

  8. #67
    Colonel Milcommoguy's Avatar
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    Check the bulb?

    Brightest idea I have, CAMO

  9. #68
    3 Star General TOBASH's Avatar
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    Opened gauges. Cleaned and dielectric greased everything. Disconnected ground wires. What a joy. Bolt goes through the fire wall and into the engine bay. Got it all cleaned and dielectric greased. NO CHANGE. :/

    I need a picture of wires to gauges to ensure mine is wired correctly. Maybe they are all connected to the wrong circuits?

    What a frustration!!!

    T
    Last edited by TOBASH; 09-22-2019 at 15:39.

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    4 Star General Retiredwarhorses's Avatar
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    The TM has all the troubleshooting guides in them, each gauge has one thing in common, they all have a ground, 24volt wire and the source wire.
    assuming gauge is good, the main place to look is the connection at the sending unit, if your not sure its the right wire, ohm out the wire from the dash to the sending unit.
    Retired War Horses Restoration

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    So many HMMWVs I lost count years ago....

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  12. #70
    3 Star General TOBASH's Avatar
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    Quote Originally Posted by Retiredwarhorses View Post
    The TM has all the troubleshooting guides in them, each gauge has one thing in common, they all have a ground, 24volt wire and the source wire.
    assuming gauge is good, the main place to look is the connection at the sending unit, if your not sure it’s the right wire, ohm out the wire from the dash to the sending unit.
    Some electricity getting to voltmeter to make it shutter when I turn the rig off. So it’s a possibility that live plugs placed on incorrect gauges.

    Gotta go to manuals to see if gauges plugged in to proper circuits. I have no idea what PO did or did not do so everything is suspect.

    A friend has three M998’s so I am going to open up one of his dashboards and compare where things are plugged in.

    If if that fails, off to the TM’s as you have suggested.

    Thanks!

    T
    T.O.B.A.S.H - When we feel frustrated with those around us. LOL


    The Great Wall of China is regarded as one of the Seven Wonders of the World. What is wrong with The Greatest Country in The World building its own???

    1987 M1025 Slantback, 6.2 w/3 speed
    2017 Tesla Model X P100D
    2011 Tesla Roadster
    2003 Lifted Durango with steel bumpers
    1984 Toyota BJ-44 RHD
    Restoring 1975 Toyota Iron Pig

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