JLG LSS Verticals Operator Manual - Manual (Page 11)

SECTION 2 - SERVICE PROCEDURES - LOAD SENSING SYSTEM
3124289 – JLG Lift – 2-3
Adjustment Preparation
Before performing the LSS adjustments:
• Move machine to a smooth, firm, level surface.
• Remove the platform manual storage box from main
mast header. The storage box fasteners are located
inside the manual storage box.
• Have applicable test weight to maximum platform
weight capacity, plus percentage of overload amount
available with equipment capable of hoisting the weight
into the platform.
• Set-up machine for normal operation.
WHEN PERFORMING THE FOLLOWING ADJUSTMENTS - DO NOT
ADD TO THE WEIGHT IN THE PLATFORM BY ALLOWING ANY
PART OF YOUR BODY TO REST ON THE PLATFORM.
Adjustment Procedures
Table 2-1. Test Weight Requirement Per Machine Model.
(Percent of Maximum Platform Capacity)
MODEL
OVERLOAD
ADJUSTMENT
TEST WEIGHT
POSITIVE STOP
TEST WEIGHT
All Vertical Lifts 110% 120%
Example:
110% Overload Test Weight = Max. Platform Capacity + 10%
120% Positive Stop Test Weight = Max. Platform Capacity + 20%
Capacity 110% 120%
300 lb.
(136kg)
330 lb.
(150kg)
360 lb.
(163kg)
350 lb.
(159kg)
385 lb.
(175kg)
420 lb.
(191kg)
500 lb.
(227kg)
550 lb.
(250kg)
600 lb.
(272kg)
Coil Spring Pre-Load Adjustment Procedure
(As viewed from rear with mast hidden)
1. Perform the spring pre-load adjustment with NO
LOAD IN THE PLATFORM.
2. Adjust the coil spring height (item 1) between the
mast crossmember (item 2) and the platform cross-
member (item 3) to two (2) inches (51mm) by loosen-
ing or tightening the locknut on the bottom of the
center bolt (item 4) (see note below).
3. Adjust outside spring bolts (items 5) until the locknuts
on the bottom of the bolts are flush with the end of
each bolt. The outside bolts will be loose.
NOTE: Machines with capacities up to 300 lb. (136kg)
only require two coils springs installed on the
outside bolt positions. Machines with capacities
over 300 lb. (136kg) require coil springs installed
in all three bolt positions.