Hawk Industries Hawkjaw Sr. Manual ALS Serial Numbers 1 to 100 - Manual (Page 70)

Trouble Shooting
Symptom Remedy
Movement
at Start-up
(cont) Spinner moves forward, the
doors close and the spinner
begins to spin. (cont.)
Spinner does not move
forward, doors do not close, but
the chain begins to move.
z
Make sure the hydraulic power unit is shut down.
Press the Grip button repeatedly to bleed hydraulic
pressure. Access the main hydraulic block. See
Maintenance & Repair, p. 66, Drawings p. 114, 128.
At start-up, no air should reach the hydraulic valve
V1 at Port B. Push in the "E" stop button.
Disconnect the Spin button clear air hose to Port B
on the hydraulic valve V1 at either leg of the "T" air
connector. To disconnect the air hose, push the hose
and collet ring into the valve pilot port. While
holding down the collet ring, pull out the air hose.
Place your hand over the disconnected air hose, and
pull out the "E" stop button. No air should come
out of the hose. If air comes out of the hose, replace
the air logic system. See Maintenance & Repair,
p. 66, Drawings, p. 126. If no air comes out of the
Spin air hose when the "E" stop is pulled out, replace
the hydraulic valves V1 and V2. See Maintenance &
Repair, p. 66, Drawings, p. 114, 128.
z
Make sure the hydraulic power unit is shut down.
Press the Grip button repeatedly to bleed hydraulic
pressure. Access the main hydraulic block. See
Maintenance & Repair, p. 66, Drawings p. 114, 128.
At start-up, no air should reach the hydraulic valve
V1 at Port B. Push in the "E" stop button. Discon-
nect the Spin button clear air hose to Port B on the
hydraulic valve V1 at either leg of the "T" air
connector. To disconnect the air hose, push the hose
and collet ring into the valve pilot port. While
holding down the collet ring, pull out the air hose.
Place your hand over the disconnected air hose, and
pull out the "E" stop button. No air should come
out of the hose. If air comes out of the hose, replace
the air logic system. See Maintenance & Repair, p.
66, Drawings, p. 126. If no air comes out of the Spin
air hose when the "E" stop is pulled out, replace the
hydraulic valve V1. See Maintenance & Repair, p.
66, Drawings, p. 114, 128.
Continued on next page.
70 Troubleshooting