JLG 15VPSP Operator Manual - Manual (Page 29)

SECTION 3 - USER RESPONSIBILITIES & MACHINE CONTROLS
3120796 – JLG Lift – 3-5
3.5 JLG POT-HOLE PROTECTION DEVICE
(See Figure 3-4.)
VPSP model lifts are equipped with JLG’s Pot-Hole-Pro-
tection system (PHP). The PHP system consists of hinged
steel bars extending from the bottom edge of both sides
of the base frame. The steel bars are cable operated by a
spring loaded actuator mounted on the base frame
directly under the mast assembly. The PHP bars are auto-
matically ENGAGED (lowered) when the platform is raised
more than (approximately) six (6) inches. The bars have a
ground clearance of approximately three quarters (3/4)
inch when ENGAGED (lowered), and are designed to sup-
port the weight of the machine should one of its wheels
drop into a hole or crack. As the machine drops onto the
PHP bar, the bar will limit the amount of tilt the machine
will incur and reduce the likelihood of the machine tipping
over. If this condition should occur, the operator must then
fully lower and exit the platform, then safely remove the
machine from the situation.
When the machine is driven in areas where obstacles are
higher than three quarters (3/4) inch off the work surface
(door sills, thick carpeting, etc.) the platform must be com-
pletely lowered to allow the PHP bars to DISENGAGE
(retract), allowing sufficient clearance of the machine’s
base frame.
Figure 3-4. JLGs Pot-Hole-Protection Device -
PHP Bar Operation.