Upright LX31, Service & Parts Manual, Page: 53 / 188

Troubleshooting
Section
5-1 LX 31/41 Work Platform
5.0 Introduction
The following section on troubleshooting provides
guidelines on the types of problems users may encoun-
ter in the field, helps determine the cause of problems,
and suggests proper corrective action.
Careful inspection and accurate analysis of the symp-
toms listed in the Troubleshooting Guide will localize
the trouble more quickly than any other method. This
manual cannot cover all possible problems that may
occur. If a specific problem is not covered in this
manual, call our toll free number for service assistance.
Referring to
Section 3.0 and 6.0 will aid in understand-
ing the operation and function of the various compo-
nents and systems of the LX 31/41 and help in diagnos-
ing and repair of the machine.
GENERAL PROCEDURE
Troubleshooting should be carried out in two steps.
First, thoroughly study both hydraulic and electric
schematics to determine possible causes. Loose terminal
connections and short circuits are always a potential
cause when troubleshooting. Second, check suspect
components electrically, hydraulically and mechanically
to determine if they are at fault.
When troubleshooting, ensure that the work
platform is resting on a firm, level surface.
When performing any service which requires
the platform to be raised, the Elevating
Assembly must be blocked.
Disconnect the battery ground cable when
replacing or testing the continuity of any
electrical component.
5.0
FOR SERVICE ASSISTANCE
,
IN THE
U.S.A.,
CALL
:
1-800-926-LIFT
5.1 Troubleshooting Guide
Table 5-1: Troubleshooting Guide
PROBLEM PROBABLE CAUSE REMEDY
All functions 1. Blown Control Check 15 amp Control Circuit
inoperable, Circuit Breaker Breaker. Replace if blown.
Engine does 2. Faulty Battery. Check condition of battery.
not start. If serviceable, recharge battery.
If defective, replace battery.
3. Emergency Stop With the Emergency Stop
Switch failed open. Switch in the ON position,
check continuity across
the contacts. If none, replace.
4. Key Switch. Replace switch if inoperative.
Engine fails to 1. Battery terminals Check and tighten terminals.
start. Does not corroded or loose.
crank or 2. Discharged Check condition of battery.
cranks slowly. battery. If serviceable, recharge battery.
If defective, replace battery.
3. Starter Solenoid. Replace the starter solenoid.
4. Starter Motor. Repair or replace starter.
5. Key Switch. Replace the switch.
6. Main Circuit Breaker. Check Circuit Breaker and
replace if required.
7. Emergency Stop Replace switch if inoperative.
Switch.
Engine cranks 1. Engine Cold Diesel: warm the Glow Plugs for
but will not 6 seconds prior to starting.
start. Gasoline: Engage the Choke
button while cranking.
2. Out of fuel Fill tank.
3. Blocked fuel line. Remove obstruction.
4. Fuel Filter clogged. Clean or replace filter.
5. Air in the fuel Tighten all fuel line fittings or clamps.
system. Diesel Engine: Bleed System
6. Water in fuel Drain tank if necessary to remove
system. all water.
7. Oil Pressure Check Pressure Switch.
Switch inoperative. Replace if faulty.
8. Fuel Pump Check fuel delivery, replace
defective/damaged. pump if necessary.
9. Ignition system faulty. Check for spark, repair Ignition
(Gas / Propane) System as necessary