Global Industrial 988993 User Manual

MODEL 988993

POWERED PALLET TRUCK

Operation

Maintenance

Repair Parts List

Global Industrial	MANUAL NO. BL-GL33-0618 - 09-12-2019
globalindustrial.com

WARNING

Do not operate this truck unless you have been authorized and trained to do so, and have read all warnings and instructions in Operator’s Manual and on this truck.

Do not operate this truck until you have checked its condition. Give special attention to wheels, horn, battery, controller, lift system, brakes, steering mechanism, guards and safety devices.

Operate truck only from designated operating position. Do not carry passengers. Keep feet clear of truck and wear foot protection.

Observe applicable traffic regulations. Yield right of way to pedestrians. Slow down and sound horn at cross aisles and wherever vision is obstructed.

Start, stop, travel, steer and brake smoothly. Slow down for turns and on uneven or slippery surfaces that could cause truck to slide or overturn. Use special

care when traveling without load as the risk of overturn may be greater.

Always look in direction of travel. Keep a clear view, and when load interferes with visibility, travel with load trailing.

Use special care when operating on ramps travel slowly, and do not angle or turn. Travel with load downhill.

Do not handle loads which are higher than the chassis unless load is secured so that no part of it could fall backward. Before lifting, be sure load is centered, forks are completely under the chassis backrest.

When leaving truck, neutralize travel control, fully lower lifting mechanism and set brake. When leaving truck unattended, also shut off power.

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TABLE OF CONTENTS

	Section		Page	Section		Page
	DESCRIPTION..................................................................		1-1	5-1.7	HORN SWITCH REPLACEMENT................	5-5
	1-1	INTRODUCTION. .........................................	1-1	5-1.8	LIFT AND LOWER SWITCH
	1-2	GENERAL DESCRIPTION...........................	1-1		REPLACEMENT ..........................................	5-6
	1-3	SAFETY FEATURES....................................	1-2
	OPERATION.....................................................................		2-1	5-2	UPPER COMPARTMENT COVERS............	5-7
	2-1	GENERAL.....................................................	2-1	5-2.1	REMOVAL....................................................	5-7
	2-2	OPERATING PRECAUTIONS......................	2-1	5-2.2	INSTALLATION............................................	5-7
	2-3	BEFORE OPERATION.................................	2-1	5-3	LOWER COMPARTMENT COVERS...........	5-8
	2-4	GENERAL CONTROL OPERATION............	2-4	5-3.1	REMOVAL....................................................	5-8
	2-5	DRIVING AND STOPPING PROCEDURES 2-4		5-3.2	INSTALLATION............................................	5-8
	2-6	BELLY-BUTTON SWITCH............................	2-4	5-4	STEERING ARM..........................................	5-9
	2-7	STEERING ARM GAS SPRING...................	2-5	5-4.1	RETURN SPRING REPLACEMENT............	5-9
	2-8	LIFT AND LOWER CONTROLS...................	2-5	5-4.2	STEERING ARM REMOVAL .......................	5-9
	2-9	LOADING AND UNLOADING.......................	2-5	5-4.3	STEERING ARM INSTALLATION ...............	5-9
	2-10	PARKING......................................................	2-5	BRAKE SERVICING		6-1
	PLANNED MAINTENANCE		3-1
				6-1	BRAKES.......................................................	6-1
	3-1	GENERAL.....................................................	3-1	6-1.1	BRAKE ASSEMBLY REPLACEMENT.........	6-1
	3-2	MONTHLY AND QUARTERLY CHECKS.....	3-1
	3-3	BATTERY CARE .........................................	3-1	TRANSMISSION, DRIVE WHEEL, LOAD WHEEL..........		7-1
	3-3.1	GENERAL.....................................................	3-1	7-1	DRIVE WHEEL ............................................	7-1
	3-3.2	SAFETY RULES...........................................	3-2	7-2	TRANSMISSION..........................................	7-1
	3-3.3	BATTERY CARE AND CHARGING .............	3-2	7-3	LOAD WHEEL..............................................	7-3
	3-3.4	BATTERY CLEANING 2		7-3.1	REMOVAL....................................................	7-3
	3-3.5	MAINTENANCE FREE BATTERIES............	3-2	7-3.2	REPAIR........................................................	7-3
	3-4	CHARGING BATTERIES..............................	3-3	7-3.3	LOAD WHEEL INSTALLATION...................	7-3
	3-5	BATTERY REPLACEMENT .........................	3-4	ELEVATION SYSTEM SERVICING		8-1
	3-6	LUBRICATION..............................................	3-5
				8-1	LIFT LINKAGE .............................................	8-1
	TROUBLESHOOTING......................................................		4-1	8-1.1	REMOVAL....................................................	8-1
	4-1	GENERAL.....................................................	4-1	8-1.2	REPAIR........................................................	8-2
	4-2	CONTROLLER TROUBLESHOOTING........	4-4	8-1.3	INSTALLATION............................................	8-2
	4-2.1	FAULT DETECTION.....................................	4-4	HYDRAULIC SYSTEM SERVICING		9-1
	4-2.2	HAND HELD PROGRAMMER (OPTIONAL)4-4
	4-3.3	FAULT RECORDING....................................	4-4	9-1	LINES AND FITTINGS.................................	9-1
	4-3.4	GENERAL CHECKOUT................................	4-4	9-2	HYDRAULIC AND ELECTRICAL
	4-3.5	DIAGNOSTIC HISTORY...............................	4-6		ASSEMBLY REMOVAL ...............................	9-2
	4-3.6	TEST THE FAULT DETECTION		9-2.1	REMOVAL....................................................	9-2
		CIRCUITRY ..................................................	4-6	9-2.2	INSTALLATION............................................	9-2
	4-3.7	DIAGNOSTICS AND		9-3	HYDRAULIC PUMP, MOTOR
		TROUBLESHOOTING..................................	4-6		AND RESERVOIR ASSY.............................	9-2
	4-3.7.1	LED Diagnostics ...........................................	4-6	9-3.1	REMOVAL....................................................	9-2
	4-3.8	PROGRAMMER DIAGNOSTICS................	4-16	9-3.2	DISASSEMBLY AND REASSEMBLY..........	9-2
				9-3.3	INSTALLATION............................................	9-2
	STEERING ARM, CONTROL HEAD			9-4	LIFT CYLINDER...........................................	9-5
	AND COMPARTMENT .....................................................		5-1	9-4.1.	REMOVAL....................................................	9-5
	5-1	CONTROL HEAD .........................................	5-1	9-4.2	REPAIR........................................................	9-5
	5-1.1	CONTROL HEAD REMOVAL.......................	5-1	9-4.3	INSTALLATION............................................	9-6
	5-1.2	CONTROL HEAD INSTALLATION...............	5-3	ELECTRICAL COMPONENTS		10-1
	5-1.3	CONTROL HEAD COVERS REMOVAL.......	5-3
	5-1.4	CONTROL HEAD COVERS		10-1	ELECTRICAL CONTROL PANEL..............	10-1
		INSTALLATION ............................................	5-3	10-1.1	MAINTENANCE.........................................	10-1
	5-1.5	SPEED POTENTIOMETER		10-1.2	CLEANING.................................................	10-1
		REPLACEMENT...........................................	5-3	10-1.3	CONTROLLER REMOVAL........................	10-1
	5-1.6	BELLY-BUTTON SWITCH REPLACEMENT5-4		10-1.4	CONTROLLER INSTALLATION................	10-1

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1

TABLE OF CONTENTS - CONTINUED

Section		Page	Section		Page
10-1.5	CHARGER REMOVAL...............................	10-1	10-1.16	EMERGENCY DISCONNECT INSTALL	....10-4
10-1.6	CHARGER INSTALLATION.......................	10-1	10-1.17	LIFT LIMIT SWITCH REMOVAL ................	10-6
10-1.7	COOLING FAN REMOVAL........................	10-3	10-1.18	LIFT LIMIT SWITCH INSTALLATION ........	10-6
10-1.8	COOLING FAN INSTALLATION................	10-3	10-2	PUMP MOTOR...........................................	10-7
10-1.9	BUZZER REMOVAL ..................................	10-3	10-3	DRIVE MOTOR ..........................................	10-7
10-1.10	BUZZER INSTALLATION ..........................	10-3	10-4	DEADMAN SWITCH...................................	10-7
10-1.11	KEY SWITCH REMOVAL ..........................	10-3	10-4.1	REPLACEMENT.........................................	10-7
10-1.12	KEY SWITCH INSTALLATION ..................	10-3
10-1.13	BATTERY INDICATOR REMOVAL ...........	10-3	OPTIONAL EQUIPMENT ...............................................		11-1
10-1.14	BATTERY INDICATOR INSTALLATION ...	10-3
10-1.15	EMERGENCY DISCONNECT REMOVAL. 10-3		ILLUSTRATED PARTS BREAKDOWN..........................		12-1

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SECTION 1

DESCRIPTION

1-1. INTRODUCTION.
This publication describes the 24 volt 988993 lift truck
distributed by Global Industrial. Included are operating
instructions, planned maintenance instructions, lubri-
cation procedures, corrective maintenance procedures
and a complete parts list with part location illustrations.
Users shall comply with all requirements indicated in
applicable OSHA standards and current edition of
A.N.S.I. B56.1 Part II. By following these requirements
and the recommendations contained in this manual,
you will receive many years of dependable service
from your 988993 lift truck.
1-2. GENERAL DESCRIPTION.
The self-propelled 988993 truck, Figure 1-2, lifts and
transports payloads up to 3300 pounds on rigid forks.
The forward and reverse motion is controlled by either
of two controller levers mounted on the control head.
Stopping and turning is controlled by the steering arm.
Lift and Lower is controlled by pushbuttons on the con-
trol head. The battery powered lift truck is quiet and
without exhaust fumes.
The reversible DC motor propels the lift truck in for-
ward or reverse direction throughout the available
speed range. The 988993 lift truck can be driven with
forks raised or lowered. The lift truck must be pro-
tected from the elements.
The model number will be found on the name plate	R8548
(Figure 1-1) along with the serial number, lifting capac-	Figure 1-1 Name Plate
ity, and load center. Figure 1-2 shows the locations of
the truck’s main components and controls.

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1-1

GL33-14

Figure 1-2 Lift Truck

1-3. SAFETY FEATURES.

The 988993 is designed and engineered to provide maximum safety for operator and payload. Some of the safety features incorporated into the design are:

•Dead-man brake to apply the brake and cut off drive power when the steering arm is released.

•Belly-button switch to reverse truck should the operator accidentally pin himself against a wall or obstruction when backing up in slow speed.

•All control functions automatically return to “OFF” when released.

•Emergency Disconnect within operator's reach.

•Readily accessible horn button.

•Handle to provide a firm hand hold for operator.

•Flow control valve regulates maximum lowering speed within prescribed limits.

•Relief valve maintains hydraulic pressure within prescribed limits.

•High visibility color scheme of truck provides visual alert of truck’s presence.

•Battery Indicator

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SECTION 2 OPERATION

2-1. GENERAL.

This section gives detailed operating instructions for the 988993 lift truck. The instructions are divided into the various phases of operations, such as operating lift, driving, and stopping. Routine precautions are included for safe operation.

2-2. OPERATING PRECAUTIONS.

WARNING: Improper operation of the lift truck may result in operator injury, or load and/or lift truck damage. Observe the following precautions when operating the 988993 lift truck.

The following safety precautions must be adhered to at all times.

•Do not operate this truck unless you have been trained and authorized to do so and have read all warnings and instructions in this manual and on the truck.

•All warnings and instructions must be read and understood before using the equipment.

•Equipment must be inspected by a qualified person on a regular basis.

•Do not operate this truck until you have checked its condition. Give special attention to Wheels, Horn, Batteries, Controller, Lift System, Brakes, Steering Mechanism, Guards and Safety Devices

•Operate truck only from designated operation position. Wear foot protection. Do not carry passengers.

•Observe applicable traffic regulations. Yield right of way to pedestrians. Slow down and sound horn at cross aisles and wherever vision is obstructed.

•Start, stop, travel, steer and brake smoothly. Slow down for turns and on uneven or slippery surfaces that could cause truck to slide or overturn. Use special care when traveling without load as the risk of overturn may be greater.

•Always look in direction of travel. Keep a clear view, and when load interferes with visibility, travel with load or lifting mechanism trailing.

•Do not overload truck. Check nameplate for load weight and load center information.

•Before lifting, be sure load is centered, forks are completely under load, and load is as far back as possible against the chassis.

•Do not handle loads which are higher than the chassis unless load is secured so that no part of it could fall backward.

•When leaving truck, neutralize travel control. Fully lower lifting mechanism and set brake. When leaving truck unattended, turn off key switch and disconnect switch, and remove key.

2-3. BEFORE OPERATION

Table 2-1 covers important inspection points on the 988993 lift truck which should be checked prior to operation. Depending on use, some trucks may require additional checks.

Figure 2-1 shows a sample format for an Operator Checklist, which can be modified as necessary to fit your operation.

WARNING: Periodic maintenance of this truck by a QUALIFIED TECHNICIAN is required.

CAUTION: A QUALIFIED SERVICE TECHNICIAN should check the truck monthly for proper lubrication, proper fluid levels, brake operation, motor maintenance and other areas specified in the SECTION 3.

WARNING: If the truck is found to be unsafe and in need of repair, or contributes to an unsafe condition, report it immediately to the designated authority. Do not operate it until it has been restored to a safe operating condition. Do not make any unauthorized repairs or adjustments. All service must be performed by a qualified maintenance technician.

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2-1

Table 2-1 Operator Checks

ITEM	PROCEDURE
Transmission	Check for signs of fluid leakage.
and hydraulic
systems.
Forks	Check for cracks and damage.
Safety signs	Check that warning labels,
	nameplate, etc., are in good
	condition and legible.
Horn	Check that horn sounds when
	operated.
Steering	Check for binding or looseness in
	steering arm when steering.
Travel controls	Check that speed controls on
	control head operate in all
	speed ranges in forward and
	reverse and that belly button
	switch functions.

ITEM	PROCEDURE
Wheels	Check drive wheel for cracks or
	damage. Move truck to check
	load for freedom of rotation.
Hydraulic	Check operation of lift and lower
controls	to their maximum positions.
Brake	Check that brake actuates when
	steering arm is raised to upright
	position, and when lowered to
	horizontal position.
Deadman/	Check that steering arm raises to
Parking brake	upright position when released
	and brake applies.
Battery	Check that battery can be
disconnect	disconnected and recon-
	nected. Check for connector
	damage.
Battery charge	Check the battery indicator.

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R8549

Figure 2-1 Sample of Operator Check List

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2-3

2-4. GENERAL CONTROL OPERATION.

The speed control (See Figure 2-2) located on each side of the control head provides fingertip control for driving the truck. Rotate the control in the direction you want to travel. The farther you rotate the control from the neutral position, the faster the truck will travel.

R6617

Figure 2-2 Forward/Reverse Control

The pushbutton switches (See Figure 2-3), located on the front of the control head activate the lift-lower controls and the horn.

R6618

Figure 2-3 Pushbutton Switches

The brake is fully applied by lowering or raising the steering arm. (See Figure 2-4) All traction control power is shut off when the brake is engaged. When the steering arm is in the upright position, the brake acts as a parking brake. Deadman braking occurs when the handle is released and spring action raises steering arm to the upright position.

R8505

Figure 2-4 Brake Actuation

2-5. DRIVING AND STOPPING PROCEDURES.

1.Turn on the emergency disconnect and the key switch. Grasp the grips of the steering head so that the speed control can be comfortably operated by either thumb.

2.Lower the steering arm to a comfortable position above horizontal to disengage the brake and to energize the electrical circuits. If the truck is not moved, the electrical circuits will time out and will deenergize. See Figure 2-4.

3.To move forward (with load in front), slowly press the speed control forward. See Figure 2-2. Press the forward speed control farther to increase speed.

4.To slow down or stop, release the speed control and lower or raise the steering arm to the horizontal or vertical position. See Figure 2-4. In those positions, the brake engages, slowing or stopping the truck.

5.Procedures for movement in reverse are the same as in the forward direction except slowly press the speed control backward. See Figure 2- 2.

2-6. BELLY-BUTTON SWITCH.

The belly-button switch (Figure 2-5) minimizes the possibility of the driver being pinned by the steering arm while driving the lift truck in slow speed. If the switch presses against the operator while the lift truck is being driven toward the operator, the switch changes the direction of the lift truck.

2-4	BL-GL33-0618 - 07-16-2019

R6619

Figure 2-5 Belly-Button Switch

2-7. STEERING ARM GAS SPRING.

The steering arm gas spring automatically raises the steering arm to the upright position when the steering arm is released. If the steering arm does not return fully, the steering arm gas spring requires replacement. Return truck to maintenance for repair.

2-8. LIFT AND LOWER CONTROLS.

Lift/Lower Control buttons are located on the steering control head. (Figure 2-3)

To lift forks, push in either LIFT button and hold until forks reach desired height. To lower forks, push in either LOWER button and hold until forks descend to desired height.

2-9. LOADING AND UNLOADING.

1.Move truck to location where load is to be picked up.

2.Move the truck into position so forks are within pallet or skid, and the load is centered over the forks and as far back as possible.

3.Raise forks to lift load.

4.Drive to area where load is to be placed.

5.Move truck to align load with its new position.

6.Lower the load until it rests squarely in place and the forks are free.

7.Slowly move the truck out from under the load.

2-10.PARKING.

When finished with moving loads, return the truck to its maintenance or storage area. Turn off the emergency Disconnect and the key switch. Charge batteries as necessary. Refer to battery care instructions, SECTION 3.

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2-5

NOTES

2-6	BL-GL33-0618 - 07-16-2019

SECTION 3

PLANNED MAINTENANCE

3-1. GENERAL.

Planned maintenance consists of periodic visual and operational checks, parts inspection, lubrication, and scheduled maintenance designed to prevent or discover malfunctions and defective parts. The operator performs the checks in SECTION 3, and refers any required servicing to a qualified maintenance technician who performs the scheduled maintenance and any required servicing.

3-2. MONTHLY AND QUARTERLY CHECKS.

Table 3-1 is a monthly and quarterly inspection and service chart based on normal usage of equipment eight hours per day, five days per week. If the lift truck is used in excess of forty hours per week, the frequency of inspection and service should be increased accordingly. These procedures must be performed by a qualified service technician or your Global Industrial Service Representative.

3-3. BATTERY CARE.

3-3.1. General

The 988993 may be equipped with maintenance free batteries.

The care and maintenance of the battery is very important to obtain efficient truck operation and maximum battery life.

CAUTION: Gases produced by a battery can be explosive. Do not smoke, use an open flame, create an arc or sparks in the vicinity of the battery. Ventilate an enclosed area well when charging.

CAUTION: Batteries contain sulfuric acid which may cause severe burns. Avoid contact with eyes, skin or clothing. In case of contact, flush immediately and thoroughly with clean water. Obtain medical attention when eyes are affected. A baking soda solution (one pound to one gallon of water) applied to spilled acid until bubbling stops, neutralizes the acid for safe handing and disposal.

Leakage voltage from battery terminals to battery case can cause misleading trouble symptoms with the truck electrical system. Since components of the truck electrical system are insulated from truck frame, leakage voltage will not normally affect truck operation unless a short circuit or breakdown of circuit wire insulation to truck frame occurs.

A voltage check from battery connector terminal to battery case should indicate near zero volts. Typically, however, the sum of the voltages at both terminals will equal battery volts. This leakage voltage will discharge the battery. As battery cleanliness deteriorates, the usable charge of the battery decreases due to this self discharge.

	Table 3-1 Monthly and Quarterly Inspection and Service Chart
	VISUAL CHECKS
INTERVAL	INSPECTION OR SERVICE
Monthly	Check electrical brake for proper operation.
Monthly	Check load wheels for wear. A poly load wheel must be replaced if worn to within 1/16 inch
	of hub. Check for separation from hub.
Monthly	Check drive wheel for wear. A poly drive wheel must be replaced if worn to within 3/4 inch of
	hub. Check for separation from hub.
Monthly	Inspect wiring for loose connections and damaged insulation.
Monthly	Inspect contactors for proper operation.
Monthly	Check deadman brake switch for proper operation.
Quarterly	Check lift cylinder for leakage.
Quarterly	Check for excessive jerking of steering arm when stopping or starting.

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3-1

Although a leakage voltage reading of zero volts may not be possible, a cleaner battery will have more usable charge for truck operation and not affect operation of electronic devices on the unit.

3-3.2. Safety Rules

•Wear protective clothing, such as rubber apron, gloves, boots and goggles when performing any maintenance on batteries. Do not allow electrolyte to come in contact with eyes, skin, clothing or floor. If electrolyte comes in contact with eyes, flush immediately and thoroughly with clean water. Obtain medical attention immediately. Should electrolyte be spilled on skin, rinse promptly with clean water and wash with soap. A baking soda solution (one pound to one gallon of water) will neutralize acid spilled on clothing, floor or any other surface. Apply solution until bubbing stops and rinse with clean water.

•If truck is equipped with wet cell batteries, keep vent plugs firmly in place at all times except when adding water or taking hydrometer readings. Do not allow dirt, cleaning solution or other foreign material to enter cells. Impurities in electrolyte has a neutralizing effect reducing available charge.

•Do not bring any type of flame, spark, etc., near the battery. Gas formed while the battery is charging, is highly explosive. This gas remains in cell long after charging has stopped.

•Do not lay metallic or conductive objects on battery. Arcing will result.

•Do not touch non-insulated parts of DC output connector or battery terminals to avoid possible electrical shock.

•De-energize all AC and DC power connections before servicing battery.

•Do not charge a frozen battery.

•Do not use charger if it has been dropped or otherwise damaged.

3-3.3. Battery Care and Charging

CAUTION: Never smoke or bring open flame near the battery. Gas formed during charging is highly explosive and can cause serious injury.

1.Charge the battery only in areas designated for that use.

2.Battery terminals should be checked and cleaned of corrosion regularly. Good battery terminal contact is essential not only for operation, but also for proper charging of the battery.

3.The charging requirements will vary depending on the use of the truck. The battery should be given as equalizing charge on a weekly basis. This charge should normally be an additional three hours at the finish rate.

4.Make certain battery used meets weight and size requirements of truck. NEVER operate truck with an undersized battery.

3-3.4. Battery Cleaning

Always keep vent plugs tightly in place when cleaning battery. When properly watered and charged, the battery will remain clean and dry. All that is necessary is to brush or blow off any dust or dirt that may accumulate on them. However, if electrolyte is spilled or overflows from a cell, it should be neutralized with a solution of baking soda and water, brushing the soda solution beneath the connectors and removing grime from the covers. Then rinse the battery with cool water from a low pressure supply to remove the soda and loosen dirt. If batteries stay wet consistently, they may be either overcharged or over filled. This condition should be investigated and corrected.

3-3.5. MAINTENANCE FREE BATTERIES

Some trucks may be equipped with maintenance free batteries. These batteries are completely sealed, will not require any watering and have a full 80% discharge available.

Sealed Maintenance Free batteries contain a pressure release valve and under normal operating conditions do not require any special ventilation.

CAUTION: Do not try to open this battery or remove the pressure release valve.

Only under severe overcharging, such as connected to an improperly sized charger, will any significant amount of gasses be released from the battery. Also, being a valve regulated battery, it never requires watering.

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3-4. CHARGING BATTERIES

Charging requirements will vary depending on depth of discharge and temperature. Follow safety rules when placing a battery on charge.

Proceed as follows:

1.Park truck at charging station with forks lowered and turn the key switch off.

2.Check the condition of the AC cord and battery cables. If there are any cuts in the cable, any exposed wires, loose plugs or connectors, DO NOT attempt to charge the batteries. Contact appropriate personnel for repairs to be made.

3.Pull the charger cord out of the top cover (Figure

3-1) and connect to the appropriate power supply.

GL33-16

Figure 3-1 Battery Charging

R6115

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3-3

3-5. BATTERY REPLACEMENT

Access to the batteries requires removing the cover. Charging requirements will vary depending on depth of discharge and temperature. Follow safety rules when placing a battery on charge.

Proceed as follows:

a.Remove top cover screws (1, Figure 3-2) and remove the upper compartment cover (2).

GL33-17

Figure 3-2 Cover Removal

b.Remove four and front cover, this will expose the 2 batteries. (Figure 3-3).

R6761

Figure 3-3 Screw Removal

c.Tag and disconnect the three battery cables (Figure 3-4).

d.To remove the batteries pull each one out individually as required.

P

R6762

Figure 3-4 Disconnect Battery Cables

e.Install in the reverse order of remove.

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3-6. LUBRICATION.

Refer to Table 3-2 for the recommended types of grease and oil. Table 3-3 in conjunction with Figure 3-5 identifies the items requiring lubrication.

Table 3-2 Recommended Lubricants (See Table 3-3 for Application)

No. 1 Grease—Lithium base, general purpose

No. 2 (Note) Grease—Lithium base

No. 3 Hydraulic oil-Heavy duty with a viscosity of 150 SUS foam suppressing agent and rust and oxidation inhibitors

Hydraulic oil-Heavy duty with a viscosity of 100 SUS foam suppressing agent and rust and oxidation inhibitors (Note)

No. 4 SAE 30 or 40 Engine lubricating oil

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3-5

GL33-18

		Figure 3-5 Lubrication Diagram
		Table 3-3 Lubrication Chart
FIG 3-2	LOCATION	METHOD OF	TYPE	APPLICATION
INDEX		APPLICATION	(Table	OF
NO.			3-3)	LUBRICANT
1	Transmission Grease	Can	No. 1	Fill to level plug
2	Hydraulic Reservoir	Can	No. 3	With lift carriage fully lowered, fill
	Capacity-1 quarts			reservoir with hydraulic oil to 1
				inch below opening
3	Lift Linkage Fittings*	Gun	No. 2	Pressure lubricate.

* Raise lift carriage to gain access to grease fittings.

3-6	BL-GL33-0618 - 09-12-2019

SECTION 4

TROUBLESHOOTING

4-1. GENERAL

Use Table 4-1 and Figure 4-3 as a guide to determine possible causes of trouble. The table is divided into five main categories: Truck and Hydraulic System Will

Not Operate: Truck Does Not Operate Forward or Reverse: Trouble With Braking: Trouble With Lifting Or Lowering, and Miscellaneous malfunctions.

	Table 4-1 Troubleshooting Chart
MALFUNCTION	PROBABLE CAUSE		CORRECTIVE ACTION
TRUCK AND HYDRAULIC	a. Fuse blown.		Check fuse and replace if
SYSTEM WILL NOT OPER-			necessary.
ATE	b. Battery dead or disconnected.		Check battery connections and
Truck will not travel nor will lift sys-
tem operate.			check battery voltage.
	c. Keyswitch defective.		Bypass keyswitch to determine if it
			is malfunctioning.
	d. Defective wiring.		Check for open circuit. Repair as
			required.
TRUCK DOES NOT OPERATE	a. Check all wiring. A loose con-		Tighten all loose connections
FORWARD OR REVERSE	nection may be the cause of		before further troubleshooting.
Truck does not travel forward or	malfunction.
reverse. All other functions	b. Defective deadman switch.		Check and replace switch if
operate normally.
			defective.
	c. Defective controller.		Check for proper operation and
			replace if necessary.
	d. Defective potentiometer.		Check and replace potentiometer
			if defective.
Truck travels forward but not in	Defective potentiometer in control		Check and replace potentiometer
reverse.	head.		if defective.
Truck travels reverse but not in	Defective potentiometer in control		Check and replace potentiometer
forward.	head.		if defective.
Truck travels forward and in	Defective potentiometer in control		Check and replace potentiometer
reverse at lower speeds; will	head.		if defective.
not travel at high speed.
TROUBLE WITH BRAKING	a. Defective deadman switch.		Check deadman switch for
Truck does not slow with brake, or			continuity. If none found when
brake does not engage.			the control arm is in the brake
			position, replace switch.
	b. Defective electric brake.		Replace brake.
Brake will not release.	a. Brake temperature above		Allow to cool.
	281 F (140 C).
	b. Open brake circuitry or wiring.		Make voltage checks.

BL-GL33-0618 - 09-12-2019

4-1

Table 4-1 Troubleshooting Chart - Continued

MALFUNCTION	PROBABLE CAUSE	CORRECTIVE ACTION
TROUBLE WITH BRAKING -
Continued
Brake drags.	Defective electric brake.	Replace.
Brake grabs.	Defective electric brake.	Replace.
Abnormal noise and chatter when	Defective electric brake.	Replace.
brake is applied.
TROUBLE WITH LIFTING OR	.
LOWERING
Oil sprays or flows from the top of	Defective packing in lift cylinder	Repair lift cylinder.
the lift cylinder.
Squealing sounds when lifting	a. Oil level too low.	Identify oil leak.
forks.	b. Lift linkage binding.	Apply grease.
Forks do not lift to top.	Oil level too low.	Add oil to reservoir.
Weak, slow or uneven action of	a. Defective pump or relief valve.	Check pressure. Adjust as
hydraulic system.		necessary.
	b. Worn lift cylinder.	Replace cylinder.
	c. Load larger than capacity.	Refer to I.D.plate for capacity.
	d. Defective lift motor solenoid.	Replace solenoid on electrical
		panel.
	e. Battery charge low.	Charge battery.
Forks do not lift, pump motor does	a. Battery is dead or discon-	Check and recharge if required.
not run.	nected.
	b. Defective wiring.	Check and repair as required.
	c. Defect in electrical system for	Check lift switch in control head,
	operating pump motor.	as well as the solenoid.
Forks do not lift, motor runs.	Defect in hydraulic system.	Check the oil level in the reservoir
		and the oil lines to the lift cylin-
		der, and repair as required. If
		normal, check the hydraulic
		pump, and relief valve. Repair,
		or adjust.

4-2	BL-GL33-0618 - 09-12-2019

Table 4-1 Troubleshooting Chart - Continued

	MALFUNCTION	PROBABLE CAUSE	CORRECTIVE ACTION
	TROUBLE WITH LIFTING OR
	LOWERING - Continued
	Forks lift, but will not go down.	Defect in hydraulic system	Check lowering control switch in
			control head and lowering sole-
			noid on valve assembly.
			Replace as required.
	Load will not hold	a. Oil bypassing internally in con-	Replace valve assembly.
		trol valve
		b. Worn lift cylinder or packing.	Repack cylinder.
	Platform does not lift to top. Pump	a. Oil level too low.	Add oil to reservoir.
	motor runs.	b. Load larger than capacity.	Refer to nameplate on side of
			mast for maximum load capac-
			ity.
		c. Batteries need charging.	Change batteries.
	Forks creep downward under load	Leak in hydraulic system, lift cylin-	Check for leaking fitting in hydrau-
	when in a raised position.	der or lowering valve.	lic line and repair as required.
			Repack lift cylinder or replace
			valve assembly.
	MISCELLANEOUS
	Steering arm does not return to	a. Week return spring.	Replace spring.
	the upright position.
		b. Binding.	Check and free the binding item.
			Verify that the cable has not
			been damaged. Repair or
			replace as needed.
	Truck moves forward when arm is	a. Belly-button switch defective.	Check for short, and repair or
	pulled down.		replace as necessary.
		b. Short in control head.	Check wiring and repair as
			required.
	Steering arm jerks excessively	Drive wheel worn.	Replace drive wheel if worn to
	starting or stopping the truck.		within 3/4 inch of hub.
	Drive motor is jerky.	Motor internally damaged or worn.	Replace motor.

BL-GL33-0618 - 09-12-2019

4-3

4-2. CONTROLLER TROUBLESHOOTING

4-2.1. Fault Detection.

The controller provides diagnostics information to assist technicians in troubleshooting drive system problems. When a fault is detected, the appropriate fault code is signaled via the panel mounted LED.

4-2.2. Hand Held Programmer (Optional)

The hand held programmer is available that is designed specifically for use with the controller. The programmer is available through your Global Industrial dealer.

4-2.3. Fault Recording.

Fault events are recorded in the controller's memory. However, multiple occurrences of the same fault are recorded as one occurrence.

The fault event list can be loaded into the programmer for readout. The Special Diagnostics mode provides access to the controller's diagnostic history file. The history file contains the entire fault event list created since the diagnostic history file was last cleared. The standard Diagnostics mode provides information about only the currently active faults.

4-2.4. General Checkout.

Carefully complete the following checkout procedure. If you find a problem during the checkout, refer to paragraph 4-2.7. for further information.

The checkout can be conducted with or without the handheld programmer (See Paragraph 4-2.2.). However, the checkout procedure is easier with a programmer. To evaluate the system without a programmer, observe the LED and note the flashing pattern and refer to for the code description.

CAUTION: Put the vehicle up on blocks to get the drive wheel off the ground before beginning these tests.

Turn the keyswitch off and make sure the brake is applied, the throttle is in neutral, and the forward/reverse switches are open.

Do not stand, or allow anyone else to stand directly in front of or behind the vehicle during the tests.

1.Disconnect the battery charger and connect the programmer to the 4-pin connector (Figure 4-1) on the controller.

R6759

Figure 4-1. Controller Terminals

2.Turn the lift truck key switch to the ON position. The programmer should “power up” with an initial display (2, Figure 4-2), and the controllers Status LED should begin steadily blinking a single flash. If neither happens, check for continuity in the key switch circuit and controller ground.

R7090

Figure 4-2. Hand Held Programmer

4-4	BL-GL33-0618 - 09-12-2019

3.Put the controller into the diagnostic mode by pressing the “Menu Navigation Key” (1, Figure 4- 2). Using the Navigation key, select the Faults menu. Display the Faults menu by pressing the Right side of the Navigation key. Press the Right side of the Navigation key again to display the list of System Faults. The display should indicate “No Known Faults.”

Release the brake by pulling down the steering arm into the operating position. The controllers LED should continue blinking a single flash and the programmer should continue to indicate no faults. If there is a problem, the LED will flash a diagnostic code and the programmer will display a diagnostic message. If you are conducting the checkout without a programmer, look up the LED diagnostic code in Table 4-3.

When the problem has been corrected, it may be necessary to cycle the brake in order to clear the fault code.

4.With the brake released, select a direction and operate the throttle. The motor should begin to turn in the selected direction. If it does not, verify the wiring to the forward/reverse switches and motor. The motor should run proportionally faster with increasing throttle. If not, refer to Paragraph 4-2.7.

5.Put the controller into the test mode by using the Navigation key (1) to select the "Monitor" menu. Select the Monitor mode by pressing the "Right" arrow on the Navigation key. Press the Navigation key "Down" arrow to scroll down to observe the status of the forward, reverse, brake, emergency reverse, and mode switches. Cycle each switch in turn, observing the programmer. Each input should show the correct state on the programmer.

6.Check the controller's fault detection circuitry as described in Paragraph 4-2.5.

7.Take the vehicle off the blocks and drive it in a clear area. It should have smooth acceleration and good top speed.

8.Test the plug braking of the vehicle. The vehicle should smoothly slow to a stop and reverse direction, with the audible plugging tone.

9.Verify that all options, such as high pedal disable (HPD), static return to off (SRO), and anti-tie- down, are as desired.

10.Check to see whether the emergency reverse (belly button) feature is working correctly. Verify that the circuit is operational by momentarily disconnecting one of the emergency reverse wires. The vehicle should be disabled and a fault indicated.

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4-5

4-2.5. Diagnostic History

The handheld programmer can be used to access the controller's diagnostic history file. When the programmer is connected to the unit, the error log file is automatically uploaded into the handheld programmer.

To see the present status of the unit, use the Menu Navigation Key (1, Figure 4-2) to select:

Faults->System Faults.

To access this log, use the Menu Navigation Key to select:

Faults->Fault History

The faults are shown as a code and descriptive text. If there are multiple faults, you have to scroll through the list using the Up and Down Buttons on the Menu Navigation Key

The faults may be intermittent faults, faults caused by loose wires, or faults caused by operator errors. Faults such as HPD or over-temperature may be caused by operator habits or by overloading.

After a problem has been diagnosed and corrected, clearing the diagnostic history file is recommended. This allows the controller to accumulate a new file of faults. By checking the new diagnostic history file at a later date, you can quickly determine whether the problem has been completely fixed.

To clear the diagnostic history file, select: Faults->Clear Fault History.

You will be asked to confirm your actions. Use the "plus" arrow (+) for yes to clear the menu and the "minus" arrow (-) (3) to cancel your selection and not clear the Fault History.

4-2.6. Test the Fault Detection Circuitry

1.Put the vehicle up on blocks to get the drive wheel off the ground.

1.Turn off the key switch and emergency disconnect.

2.Using an inline fuse holder fitted with a 10 amp fuse and alligator clips, connect the controller's M and B- terminals.

3.Turn on the emergency disconnect (17) the key switch (20). Release the brake and apply the throttle. The motor should not operate.

4.Leave the key switch on and remove the in-line fuse wire. The vehicle status should continue to remain off.

5.Cycle the key switch off and on. Release the brake and apply the throttle. The vehicle should now operate normally.

4-2.7. Diagnostics and Troubleshooting.

The motor controller provides diagnostics information to assist in troubleshooting drive system problems. The diagnostics information can be obtained in two ways:

•Reading the appropriate display on the programmer

•Observing the fault codes issued by the panel mounted Status LED.

4-2.7.1. LED Diagnostics

During normal operation with no faults present, the Status LED is steady on. If the controller detects a fault the Status LED flashes a fault identification code continuously until the fault is corrected.

NOTE: The Status LED can only indicate one fault at a time. If multiple faults are detected, the highest priority fault code flashes until it is cleared.

With Fault Code Type parameter is set to 0, the status LED uses the fault codes listed in . Six single-digit codes are used: 2, 3, 5, 6, 7, and 9.

For suggestions about possible causes of the various faults, refer to Table 4-3 Troubleshooting Chart.

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	Table 4-2 Programmable Parameters
Parameter	Factory Setting		Description
DRIVE MENU		90A
			Sets the rate (in seconds) at which the speed command
			increases when throttle is applied with the speed limit pot is
			in its maximum speed position, and the vehicle is traveling
Accel Max Speed		1.5 sec.	forward. Larger values represent slower response.
			Note: Allowable range is restricted by the Accel Min Speed set-
			ting.
			Sets the rate (in seconds) at which the speed command
			increases when throttle is applied while the speed limit pot is
			in its minimum speed position, and the vehicle is traveling
Accel Min Speed		5.0 sec.	forward. Larger values represent slower response
			Note: Allowable range is restricted by the Accel Max Speed
			setting.
			Sets the rate (in seconds) that is used to slow down the vehicle
			when it is traveling forward at high speed and throttle is
Decel High Speed		0.6 sec.	reduced. Larger values represent slower response.
			Note: Allowable range is restricted by the Decel Low Speed
			setting.
			Sets the rate (in seconds) that is used to slow down the vehicle
			when it s traveling forward at low speed and throttle is
Decel Low Speed		1.5 sec.	reduced. Larger values represent slower response.
			Note: Allowable range is restricted by the Decel High Speed
			setting.
			Sets the rate (in seconds) at which the speed command
			increases when throttle is applied while the speed limit pot is
Rev Accel Max Speed		1.5sec.	in its maximum speed position, and the vehicle is traveling in
			reverse. Larger values represent slower response.
			Note: Allowable range is restricted by Rev Accel Min Speed
			setting.
			Sets the rate (in seconds) at which the speed command
			increases when throttle is applied while the speed limit pot is
			in its minimum speed position, and the vehicle is traveling in
Rev Accel Min Speed		5.0 sec.	reverse. Larger values represent slower response.
			Note: Allowable range is restricted by Rev Accel Max Speed
			setting.
			Sets the rate (in seconds) that is used to slow down the vehicle
			when it is traveling in reverse at high speed and throttle is
Rev Decel High Speed		0.5 sec.	reduced. Larger values represent slower response.
			Note: Allowable range is restricted by Rev Decel Low Speed
			setting.

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4-7

	Table 4-2 Programmable Parameters - Continued
Parameter	Factory Setting		Description
DRIVE MENU Cont.		90A
			Sets the rate (in seconds) that is used to slow down the vehicle
			when it is traveling in reverse at low speed and throttle is
Rev Decel Low Speed		1.5 sec.	reduced. Larger values represent slower response.
			Note: Allowable range is restricted by Rev Decel High Speed
			setting.
Key Off Decel		0.7 sec.	Sets the rate (in seconds) that is used to slow down the vehicle
			at key-off or in the event of a major fault.
			Sets the rate (in seconds) that is used to slow down the vehicle
			during emergency reverse, i.e., when a throttle command
E Stop Decel		0.6 sec.	>80% in the reverse direction is given while the vehicle is
			moving forward. This gives the operator a way to stop more
			quickly when unexpected conditions arise.
			Sets a pause before reversing direction after an emergency
E Stop Pause		0.5 sec.	reverse stop. This gives the operator time to return the throt-
			tle to neutral without moving backwards
			This parameter can be used to soften the bump associated
Soft Start		25%	with gear slack in the transaxle when throttle is applied from
			the neutral state. Larger values provide a softer slack take-
			up.
			This parameter is intended to soften the bump associated with
Gear Soften		15%	gear slack in the transaxle when throttle is released and then
			reapplied while the vehicle is still moving. Larger values pro-
			vide a softer slack take-up.
			Creep Speed helps to prevent vehicle rollback on inclines
Creep Speed		7%	when the brake is released with very little throttle applied. It is
			activated when the throttle request exceeds the throttle dead-
			band threshold.
			Sets the maximum speed at which the vehicle can be pushed.
			When the vehicle is powered on and in neutral, it enters the
			push mode when the push button is activated. The electro-
Push Max Speed		N/A	magnetic brake is released, driving is inhibited, and speed is
			limited to Push Max Speed. When the vehicle is not powered
			on and the brake is mechanically released to enable pushing,
			Push Max Speed still applies. Once sufficient voltage is gen-
			erated by the motor, speed will be limited by the controller
			Sets the speed at which a gentler deceleration is initiated when
			the throttle is released to neutral; larger values start the soft
			stop deceleration sooner.
Soft Stop Speed		13%

4-8	BL-GL33-0618 - 09-12-2019

	Table 4-2 Programmable Parameters - Continued
Parameter	Factory Setting		Description
SPEED MENU		90A
Max Speed			During forward operation, defines the requested speed at full
			throttle when the speed limit pot is in its maximum speed
Mode 1		100%	position.
Mode 2		30%	Note: Allowable range is restricted by the M1/M2 Min Speed
			setting.
			During forward operation, defines the requested speed com-
			mand at full throttle when the speed limit pot is in its minimum
Min Speed			speed position. Min Speed cannot be set higher than the pro-
			grammed Max Speed.
Mode 1		20%	Note: Allowable range is restricted by the M1/M2 Max Speed
Mode 2		20%	setting.
			Note: For this parameter to apply, a speed limit pot must be
			installed in parallel with the throttle and the Speed Limit Pot
			parameter must be programmed On (see Throttle menu).
Rev Max Speed			During reverse operation, defines the requested speed at full
Mode 1			throttle when he speed limit pot is in its maximum speed posi-
		100%	tion.
Mode 2		30%	Note: Allowable range is restricted by M1/M2 Rev Min Speed
			setting.
			During reverse operation, defines the requested speed com-
			mand at full throttle when the speed limit pot is in its minimum
			speed position. Rev Min Speed cannot be set higher than the
			programmed Rev Max Speed.
			Note: Allowable range is restricted by M1/M2 Rev Max Speed
			setting.
			Note: For this parameter to apply, a speed limit pot must be
Rev Min Speed			installed in parallel with the throttle and the Speed Limit Pot
			parameter must be programmed On (see Throttle menu).
Mode 1		10%
Mode 2		10%

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4-9

	Table 4-2 Programmable Parameters - Continued
Parameter	Factory Setting			Description
THROTTLE MENU		90A
			The 1212 controller can accept inputs from both 5k , 3-wire
			pot throttles and voltage throttles. Set the throttle type param-
			eter to match the throttle used in your application.
			5k , 3-wire pot throttles
			0	= wigwag
			1	= inverted wigwag
			2	= single-ended; neutral when wiper at PotLow
Type		7	3	= inverted single-ended; neutral when wiper at PotHigh
			4	= unipolar.
			Voltage throttles
			5	= wigwag
			6	= inverted wigwag
			7	= single-ended; neutral when wiper PotLow
			8	= inverted single-ended voltage; neutral when wiper
				PotHigh
			9	= unipolar
			Sets the maximum voltage for voltage throttles (Types 5–9).
PotHigh		5V	For 5k , 3-wire pot throttles, PotHigh is determined by the
			throttle itself.)
			Sets the maximum voltage for voltage throttles (Types 5–9).
PotLow		0V	For 5k , 3-wire pot throttles, PotLow is determined by the
			throttle itself.)
			Sets the throttle range the controller interprets as neutral.
			Increasing the parameter setting increases the neutral range.
Neutral Deadband		5%	This parameter allows the neutral deadband to be defined
			wide enough to ensure the controller goes into neutral when
			the throttle is released.
			Sets the pot wiper voltage required to produce 100% controller
			output. Increasing the Throttle Max setting reduces the wiper
Throttle Max		90%	voltage required, and therefore reduces the stroke necessary
			to produce full output. This feature allows reduced-range
			throttle assemblies to be used.
			When programmed On, vehicle drive is inhibited if a throttle
			command outside the neutral deadband is issued before the
HPD		ON	controller is powered up. Drive will continue to be inhibited
			until the throttle is returned to within the neutral deadband. If
			the HPD fault is not cleared within 10 seconds, a wiring fault
			is declared and a power cycle is required.
			This parameter is used to enable/disable the speed limit pot. If
			no speed limit pot is used, set Speed Limit Pot to Off.
Speed Limit Pot		OFF

4-10	BL-GL33-0618 - 09-12-2019

	Table 4-2 Programmable Parameters - Continued
Parameter	Factory Setting		Description
THROTTLE MENU -		90A
Continued
			The throttle map parameter adjusts the static throttle map. The
			parameter setting corresponds to the throttle command at
			half throttle.
Throttle Map		50%	A setting of 50% provides linear response. Values below 50%
			reduce the throttle command at low throttle positions, provid-
			ing enhanced slow speed maneuverability. Values above
			50% give the vehicle a faster, more responsive feel at low
			throttle positions.
			This parameter can be used to limit the controller’s response
			to sharp throttle movements, such as movements resulting
			from hand tremors.
Tremor Suppression		50%	Larger values will provide a steadier ride, but they also result in
			more sluggish response to throttle request. There is thus a
			trade-off between crispness of response (low Tremor Sup-
			pression settings) and steady speed in the presence of trem-
			ors (high settings).
			Wigwag and unipolar throttle pots should be centered. Setting
			this parameter to On inhibits driving and puts the controller
Calibration		OFF	into throttle autocalibration mode.
			Setting the parameter Off returns the controller to normal oper-
			ation.
CURRENT MENU
			Sets the maximum current the controller will supply to the
			motor during normal driving. By limiting the current supplied,
Main Current Limit		90A	this parameter can be used to protect the motor from poten-
			tially damaging currents or to reduce the maximum torque
			applied to the drive system.
			Sets the maximum current the controller will supply to the
			motor during braking. By limiting the current supplied, this
Braking Current Limit		90A	parameter can be used to protect the motor from potentially
			damaging currents or to reduce the maximum braking torque
			applied to the drive system.
			Boost current gives a brief boost of current that greatly
			improves performance with transient loads, such as starting
			on a hill, crossing a threshold, climbing obstacles, etc. When
Boost Current		90A	the controller recognizes that the motor needs more current
			to respond to a drive request, it provides a current boost of a
			set amount for a set time.
			The Boost Current parameter defines the motor current limit
			during the boost period
			This parameter sets the maximum time that the boost current is
Boost Time		0.0 sec.	allowed.

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4-11

	Table 4-2 Programmable Parameters - Continued
Parameter	Factory Setting		Description
INHIBIT MENU		90A
			The flexible speed input at J1 Pin 6 can be used to limit or to
			inhibit speed under certain conditions. For example, a switch
			could be installed under the seat so that if the operator drives
			the scooter while they are standing the max speed will be lim-
			ited.
Type		2	The Inhibit Type parameter is used to select how the inhibit
			function will be implemented. Depending on how the inhibit
			switch is wired into the system, set this parameter to:
			0 = B- active
			1 = B+ active
			2 = Open circuit active
			3 = B- inactive
			4 = B+ inactive
			5 = Open circuit inactive.
			This parameter limits the maximum speed allowed during
Speed		0%	speed inhibit mode. A setting of 0 prevents drive during
			inhibit mode.
BRAKE MENU
Delay		0.3 sec	Sets the length of delay between when zero speed is com-
			manded and the electromagnetic brake is engaged.
Fault Check		ON	Enables/disables the fault detection on the EM brake.
			A high initial voltage is applied to the brake coil when the brake
			is first released. After approximately 1 second, this peak volt-
Hold Voltage		18V	age drops to the programmed Hold Voltage. The parameter
			should be set high enough to hold the brake released under
			all the shock and vibration conditions the vehicle will be sub-
			jected to.
			When set to On, the horn output (J1 Pin 3) will act as a brake
			light driver. The brake light must be driven by a relay. The
Brake Light		OFF	brake light will be turned on when the throttle is returned to
			neutral and will remain on for about 2 seconds after the EM
			brake is engaged.
HORN MENU
			When programmed On, the horn will be used to provide audi-
			ble fault codes whenever faults are present. These are the
Fault Beep		N/A	same fault codes that are flashed by the status LED. If a fault
			should occur while the vehicle is driving in reverse with the
			reverse beep active, the fault signal will take precedence. If
			this audible fault alarm is not wanted, set Fault Beep to Off.
			When programmed On, the horn will sound whenever the vehi-
Reverse Beep		ON	cle is being driven in reverse. On vehicles with reverse
			switches, the horn will sound when the reverse switch is acti-
			vated.
Beep Constant		OFF	Sets the reverse beep to be a constant tone (when pro-
			grammed On) or a 1Hz pulse (when programmed Off).

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