Mechanical Brakes - Vanguard; General; Mechanical Brake Inspection Procedure; Brake Caliper Adjustment - Argo 6x6 Vanguard Operator's Manual

7.3 MECHANICAL BRAKES - 6x6 VANGUARD

7.3.1 GENERAL

Periodic inspection and adjustment of the mechanical brake
system is required to maintain optimum vehicle performance.
Inspect the brake pads after every 25 hours of use. Badly
worn pads can lead to brake disc damage. To inspect the
pads, first remove the firewall:
To remove the firewall:
1. Remove the front floor pan.
2. Turn the firewall release catches (located at the top right
and left side of the firewall) counter-clockwise 1/4 turn.
3. Pull both steering levers back, away from the dash as far
as possible.
4. Pull the top of the firewall back and lift it out of the vehi-
cle.

Mechanical brake inspection procedure

With the firewall removed, inspect both brake caliper assem-
blies.
Figure 7-20. Mechanical brake assemblies

7.3.2 BRAKE CALIPER ADJUSTMENT

Adjust the calipers when:
•
the brake adjustment nuts are tightened all the way but the
steering lever travel still exceeds 18cm (7") or
SECTION 7
MAINTENANCE INFORMATION
•
the total clearance between the brake pads and the brake
disc exceeds .010".
To adjust the brake calipers:
1. Tighten the lock nut with a 1/2" open end wrench, no wider
than the thickness of the lock nut (Figure 7-21). As the
lock nut is tightened, measure the clearance between the
brake disc and pad as shown in Figure 7-23, using a .010"
feeler gauge. .010" is the correct clearance between the left
brake pad and the brake disc when the right pad is pressed
against the disc.
2. Use another 1/2" open wrench to tighten the outer lock
nut to the inner one.
3. Tighten the adjustment lock nut with a 1/2" wrench so it is
snug but the bolt can still be turned freely with fingers.
4. Adjust the other brake caliper assembly by repeating steps
1 to 3.
Figure 7-21. Tightening the lock nut

7.3.3 BRAKE PAD REPLACEMENT

During the inspection of all 4 brake pads, if they are:
• worn to 3 mm (1/8") thickness as shown in Figure 7-22;
• glazed and brake efficiency is affected; or
• contaminated with lubricant and brake performance is af-
fected;
they are no longer serviceable and must be replaced.
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