HELP! Brakes won't work after new calipers

General chat about the car goes in here.
DieselSpider
Posts: 2130
Joined: Wed Dec 24, 2014 10:21 pm
Your car is a: 1978 124 Spider with Isuzu Turbo Diesel

Re: HELP! Brakes won't work after new calipers

Post by DieselSpider »

This brings us back to the absolute need to flush and refill the brake system with fresh brake fluid along with clean and lube the caliper guides/slides/wedges every two years.

If they did not clean the caliper mounts and wedges properly lubricating them with brake grease when installing the new calipers then you will have pulling problems for a while that may even off in time however without the brake grease you will eventually get binding and potentially have a caliper overheat when it fails to release.

Brake Grease:

https://shop.advanceautoparts.com/p/ame ... ake+grease
https://shop.advanceautoparts.com/p/per ... 12027858-p

https://www.oreillyauto.com/detail/b/ve ... cant&pos=1
https://www.oreillyauto.com/detail/b/pe ... cant&pos=3
User avatar
RRoller123
Patron 2020
Patron 2020
Posts: 8179
Joined: Sun Nov 13, 2011 2:04 pm
Your car is a: 1980 FI SPIDER 2000
Location: SAGAMORE BEACH, MA USA

Re: HELP! Brakes won't work after new calipers

Post by RRoller123 »

+1, good advice.
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
tima01864
Patron 2021
Patron 2021
Posts: 702
Joined: Thu Jan 12, 2012 8:01 pm
Your car is a: 1983 FIAT Pininafarina Spider 2000
Location: Wilmington, MA

Re: HELP! Brakes won't work after new calipers

Post by tima01864 »

Just bought Permatex Ceramic Extreme, Thanks for the instruction on setting the E-Brake Diesel
Danno
Posts: 1
Joined: Mon Oct 11, 2021 9:20 pm
Your car is a: 83 Pininfarina Spider 2000

Re: HELP! Brakes won't work after new calipers

Post by Danno »

Does anyone know how the two plastic caps on top of master cylinder come out? Are they threaded? The small tube that the hose hooks up to broke off and I'm trying to replace...
Thanks in advance
Dan
tima01864
Patron 2021
Patron 2021
Posts: 702
Joined: Thu Jan 12, 2012 8:01 pm
Your car is a: 1983 FIAT Pininafarina Spider 2000
Location: Wilmington, MA

Re: HELP! Brakes won't work after new calipers

Post by tima01864 »

push on rubber fitting those that feed from the reservoir.
18Fiatsandcounting
Posts: 3798
Joined: Fri Mar 15, 2019 11:23 pm
Your car is a: 1969 and 1971 124 spiders
Location: San Francisco Bay Area

Re: HELP! Brakes won't work after new calipers

Post by 18Fiatsandcounting »

Dan, as tima01864 noted, those "hose barb fittings" for the two feed lines to the MC are just pushed into a rubber collar (grommet of sorts) that sits in the recess in the MC. It's fairly common for the end of the plastic fitting to break off. The fitting does not screw in.

To remove the fitting, I just use a blunt screwdriver and pry the fitting up by the base that is pressing against the rubber collar. Sometimes you have to work it from both sides, or alternate back and forth.

There were some early fittings that were held in with a metal star-like ring, and those are very tricky to replace. I'm assuming you don't have that kind.

-Bryan
Post Reply