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freewayrandy's avatar
freewayrandy
Explorer
Nov 30, 2016

A/C seal???

I need to re-seal the a/c in my rig. Any tips to a perfect job?
Thanks.

p.s. It's a Coleman Mach.
  • I replaced the seal in my Coleman with the assistance of my wife.

    As I recall - disconnect from shore power - remove the inside shroud - disconnect the electrical harass - remove a couple of bolts which hold the AC to the rig. Then head up top.

    On top you should bring something to sit the AC your about to remove (avoid damaging the roof) I used some plywood. Remove the exterior shroud - lift up the unit (heavy but one man job) and place it on the plywood or whatever. Remove the old gasket and clean the area up - attach the new gasket (should have it's own sticky) and then replace the AC - your wife/partner inside the rig can help you guide the placement. Once in place replace the bolts you removed (not too tight)reattach the electric harass - replace the interior/exterior shrouds. Turn on the power and test the air conditioner - if it works - then turn everything off, grab a hose and see if it's water tight - it not then you may need to tighten the bolts more.

    Might be some YouTube's on the subject.

    Hope this helps.
  • Buy a NEW ROOF Gasket

    Disconnect A/C power and control wiring (120V AC and 12V DC)

    remove hold-down bolt nuts (4 total)

    Then up on roof and lift A/C Unit up/out of rood top hole
    Clean up roof surface
    Clean up bottom pan on A/C unit where gasket sits

    Install new gasket and set A/C Unit down into hole

    Install hold down bolts....then nuts
    Tighten nuts 'X' pattern until 'SNUG' (if you have an 'INCH' torque wrench --- 40 Inch/Lbs) the new gasket is 1" thick and should be compressed to 1/2"
    Do NOT over-tighten
    You will crush gasket and deform roof line------SNUG only