User Manual
Argo Service Manual Brake System
BR-21
Ontario Drive & Gear Limited www.argoutv.com
PH.(519)- 662-2840 FAX (519)- 662-2421
This will result in a loss of braking/steering effectiveness.
NOTE
To rebuild a master cylinder, removal of the component is necessary to ensure a clean and
thorough job.
IMPORTANT
Argo Avengers have been manufactured with two brands of Master Cylinders during
specic build periods. See chart below for information on what brand your Argo was
manufactured with. The following procedure illustrates a Gremica Master Cylinder-
rebuild. Keep in mind, the following steps can be used for the Knott caliper rebuild as
well. Order the correct O-Ring kit according to the brand Master Cylinder used on
the vehicle being serviced.
Avengers Manufactured prior to
Serial Number 22388
Avengers Manufactured from
Serial Number 22388
Avengers Manufactured from
Serial Number 23663
Gremica Master Cylinders
Knott Master Cylinders
Gremica Master Cylinders
1. Remove the covers from the master cylinders and empty the cylinders of their content.
Photo 24 If you have access to a vacuum style hand pump, this works well for sucking
the uid from the reservoirs. If this is not an option, disconnect the brake hose from
the caliper and allow the reservoir to drain through the hose into a container. Pumping
the steering levers speed up the draining process.
2. Disconnect the brake line at the master cylinders. Photo 25
3. There are 2 bolts that hold the master cylinders to their mounting bracket. These are
secured by 2 nylon locknuts. Remove the 2 nylon locknuts and remove the master
cylinders from the vehicle to a clean work bench. Photo 26
NOTE
Be aware of the plunger pins and rubber boots attached to the master cylinders. Remove
these to a workbench to prevent them from dropping into the lower body of the vehicle. A
new rubber boot is supplied with the master cylinder O-ring kit and must be replaced when
rebuilding a master cylinder.