P : 8 5 5 . M P S . S H I P
m a c l e a n p o w e r . c o m
4 8 1 M U N N R D S U I T E 3 0 0
F O R T M I L L , S C 2 9 7 1 5
CONTROLS
The LL-1FPM 10-ton jack assembly has a manual control valve mounted directly on
the body of the jack that allows the operator to control and read the anchor capacity
without referencing a conversion chart. The jack is extended (to pull upward on an
anchor) by pushing the control valve handle toward the body of the jack. To retract,
pull the control valve handle away from the body of the jack. The control valve handle
is spring loaded to return automatically to the neutral position. The hydraulic design of
the control valve is not designed to hold hydraulic pressure when the valve is in the
neutral position. If it is desired to hold a constant load, then the valve handle must be
held in the open position for the duration of the load hold.
See paragraph 7 RECOMMENDED PROOF TEST METHOD.
HYDRAULIC RATING
HTMA type II
HYDRAULIC SAFETY
The Control valve on the LL-1FPM 10-ton jack assembly contains a simple hydraulic
bypass valve that limits the maximum hydraulic pressure to safe levels. This is factory
set to 1600
– 1800 psi (at an input flow rate of 8 gpm) which corresponds to 16000 –
18000 pounds of force. This is field adjustable for different anchoring requirements.
See paragraph 8 ADJUSTING THE BYPASS VALVE.
Adjustments of this bypass valve are to be done only by a qualified personnel. When
used in conjunction with the GPU-2 power unit or alternate power units listed in
paragraph 9 OTHER POWER UNITS, the bypass valve must be adjusted.
