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Old 04-18-2021, 12:08 AM   #1
Campbel45
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Location: Greenwood, IN
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1966 GMC L4000 Tilt-cab brake parts

Hi guys,

I'm hoping to get some help finding brake parts for my gmc L4000 tilt cab. I'm not having any luck with rockauto or napa.

I'm in search of a master cylinder and wheel cylinders. Attached is a few pictures of the SPID and master cylinder. I've got a Chevrolet parts book but I'm not having any luck finding the master cylinder.

This master cylinder seems unique in that the bore for the clutch is smaller than the bore for the brakes.

Thank you for the help.
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Old 04-18-2021, 07:17 AM   #2
68panelman
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Re: 1966 GMC L4000 Tilt-cab brake parts

Beautiful COE. You might want to have that unique master resleeved from Apple hydraulic and brake Calverton, NY. The use stainless steel sleeves in the cylinder bores, master and brake cylinder. Do it once, do it right, it's done for life!
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Old 04-19-2021, 07:36 AM   #3
Campbel45
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Re: 1966 GMC L4000 Tilt-cab brake parts

FYI, I believe I've found:
- Master cylinder: Centric 130.80018
- Front wheel cylinders: WC8852, WC8853
- Rear wheel cylinder: WC37095, WC37096

Still looking for:
- Brake lines
- Clutch line
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Old 04-24-2021, 05:35 PM   #4
Campbel45
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Re: 1966 GMC L4000 Tilt-cab brake parts

Guys,

I wanted to give an update. That Centric part number (130.80018) above is WRONG! Attached are a few pictures of the comparison. Based on my extended research, I am in need of part numbers: NMC P55385 (NAPA), 130.8002 (Centric), MC36347 (Raybestos), F54834 (Wagner). All of which are I believe obsolete. However, I did find an ebay seller that has new-old stock on bendix units that are exactly what I need. https://www.ebay.com/itm/224004132162

I will continue to update this until I have all new brakes. I hope it helps someone else down the road.

Thanks!
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