Service and Repair Manual
September 2016
Platform Overload Components
102
GS-84 • GS-90
Part No. 1272222
Pl atform Overl oad Compon ents
12- 1 Plat form Ov erload Sys tem
12-1
Platform Overload System (if
equipped)
How t o C alibr at e t he Pl atf orm Overl oad Syst em
How to Calibrate the Platform
Overload System (if equipped)
Machines with platform overload systems, proper
calibration is essential to safe machine operation.
An improperly calibrated platform overload system
could result in the system failing to sense an
overloaded platform. The stability of the machine is
compromised and it could tip over.
Note: Be sure the hydraulic oil level is between the
full and add marks on the oil level indicator.
Note: Perform this procedure with the machine on
a firm, level surface that is free of obstructions.
All models:
1
Models with outriggers
: Deploy the
outriggers and level the machine.
2
Apply a thin layer of dry film lubricant to the
area of the chassis where the scissor arm
wear pads make contact.
3
Disconnect the platform controls from the
machine at the platform.
4
Open the large ground control panel door and
locate connector joining the Electronic Control
Module (ECM) wire harness and the platform
controls wire harness.
Note: This connection is just below the ground
controls.
5
Tag and disconnect the platform controls wire
harness from the ECM wire harness.
6
Securely connect the platform controls to the
ECM wire harness.
7
Using a suitable lifting device, place a test
weight, corresponding to the maximum load
as indicated on the capacity indicator decal, in
the center of the platform floor. Secure the
weight to the platform. Refer to the chart
below.
GS-3384 and GS-3390
1878 kg
GS-4390 (most models - refer to capacity
indicator decal)
1286 kg
GS-4390 (some models - refer to capacity
indicator decal)
1421 kg
GS-5390
1410 kg
8
Turn the key switch to platform control and pull
out the red Emergency Stop button to the on
position at both the ground and platform
controls. Start the engine.
9
Raise the platform to approximately 6 m.
10 Release the safety arm latch, lift the safety
arm and rotate to a vertical position. Lock the
safety arm in position.
11 Loosen the retaining ring and remove the
switch adjustment cover from the pressure
switch(es).
Note: The pressure switch is located on the lift
cylinder.
12 Using a small slotted screwdriver, turn the
adjustment screw of the platform overload
pressure switch(es) one-quarter turn into the
hydraulic line.
13 Push in the red Emergency Stop button to the
off position at the ground controls.
Содержание GS-3384
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