Changing Brake Fluid; Hydraulic Brake Pad Inspection; Firewall Removal; Brake Pad Inspection Procedure - Argo 6 x 6 Vanguard Operator's Manual

Figure 7-24. Hydraulic brake cylinder and fluid level
Do not overfill the brake master cylinders. Fluid level
must be at the top of the view window. Overfilling can
cause seal damage.
Use only SILICONE - DOT5 BRAKE FLUID. Other
brake fluid may not be compatible with ARGO brake
components and operating temperatures. Use of other
fluids will void the warranty.

7.4.3 CHANGING BRAKE FLUID

The inherent stability of Silicone DOT 5 Brake Fluid reduces
the need for frequent brake fluid replacement. Inspect the
fluid for degradation (discolouration or particles) during nor-
mal fluid level inspections. If discolouration has occurred,
the brake fluid system should be drained, flushed and re-filled
with fresh brake fluid. If particles are evident in the fluid,
drain the system, overhaul the master cylinder and the brake
caliper before flushing and refilling. An ARGO dealer will
preform these operations for you.

7.4.4 HYDRAULIC BRAKE PAD INSPECTION

Inspect the brake pads after every 25 hours of operation. Worn,
glazed or contaminated brake pads affect the efficiency of the
brake system. To inspect the pads, first remove the firewall.
SECTION 7
MAINTENANCE INFORMATION
To remove the firewall:
1. Turn the firewall release catch (located at the bottom of
the firewall) counter-clockwise 1/4 turn.
2. Using the finger holes, pull the bottom of the firewall back
until the top of the firewall is clear of the vehicle dash.
3. Lift the firewall clear of the driving compartment.

Brake Pad Inspection Procedure

With the firewall removed, both hydraulic brake calipers are
visible. Each caliper has 2 brake pads which are secured by
cotter pins (Figure 7-27). Inspect all 4 brake pads. Replace
the pads when:
•
the brake lining material molded to each metal backing
plate is worn to 0.10" thickness. (Figure 7-26)
•
the pads are glazed and brake performance is affected.
•
the pads are contaminated with lubricant, and brake per-
formance is affected.
To replace the brake pads:
Remove both cotter pins from each brake caliper. Remove
each brake caliper from the transmission using a 5/16" hex
driver to remove the two 103-41 SHCS mounting bolts acces-
sible through the brake disc holes as shown in Figure 7-25.
Without disturbing the connection of the hydraulic hose as-
sembly, swing the caliper away from the brake disc to allow
the removal of the brake pads as shown in Figure 7-27. Install
the brake pads into the caliper assembly. Remount the caliper
to the transmission, using #242 Loctite or equivalent remov-
able compound on the threads of the 103-41 SHCS mounting
bolts and tighten securely. Insert two new cotter pins and bend
the ends over to secure the pads in position.
Pump the steering levers a few times to build up proper pres-
sure and to locate the pads in the caliper assembly. Check the
steering lever travel and adjust if required.
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