Dynojet 224/4WD: Installation Guide - Manual (Page 69)

B A S I C D Y N O O P E R A T I O N
Preventative Maintenance
Version 3 In Ground Model 224 4WD Automotive Dynamometer Installation Guide
4-15
M ODEL 224 4WD—I NSPECTING THE R AIL B RAKE C LEARANCE
Inspect the rail brake clearance once per month.
1
Shut off or disconnect the air supply to dyno, and follow your company’s lock out
procedure.
2 Press the red button on the pendant to activate the drum brakes; the button will
be lit.
3 Press and hold the dyno movement switch in either the in or out position until
you cannot hear any air going through the movement motor.
4 Using the red button on the pendant, cycle the drum brakes on and off several
times until no air is heard.
5 Remove the grate cover from the dyno to access the pit.
6 Using a ruler, measure the free play movement of each rail brake. The free play
should not exceed 5 mm (3/16 in.).
7 If the rail brake free play is out of specification adjust by loosening the jam nut
and turning the adjusting bolt until free play is within specification. Tighten the
jam nut while holding the adjusting bolt.
Figure 4-9: Inspect the Rail Brake Clearance