To find HWH® Replacement Parts, Operator Manuals, and Service Manuals
it is often necessary to know what system you have.

This document will help identify which system you have, with the aid of pictures and descriptions of key components

such as control panels, indicator light panels, control boxes, control modules, and sensing units.

If you do NOT know the general control system gategory (below),
click here to VIEW ALL LEVELING SYSTEMS.

Otherwise, please click on the general category below.

1XX Series | Lever-Controlled (Hydraulic) (1967 – Present)

2XX Series | Joystick-Controlled (Hydraulic) (19XX – Present)

3XX Series | Touch Panel-Controlled (Air or Hydraulic) (1995 – 2004)

4XX Series | Paddle Switch-Controlled (Hydraulic) (1985 – 1992)

5XX Series | Computer-Controlled (Touch Panel) (Air, Hydraulic, Air/Hydraulic) (1988 – 1993)

6XX Series | Computer-Controlled (Touch Panel) (Air, Hydraulic, Air/Hydraulic) (1988 – 2006)

7XX Series | Computer-Controlled (Touch Panel) (Air or Hydraulic) (YYYY – Present)

2000 Series | Computer-Controlled (Touch Panel) (Air, Hydraulic, Air/Hydraulic) (YYYY – Present)

Precision Leveling | Computer-Controlled (Touch Panel) (Hydraulic) (YYYY – Present)

Active Air Suspension Leveling | Computer-Controlled (LCD Panel) (Air or Air/Hydraulic) (YYYY – Present)

Hand-Pump Leveling / Landing Gear (Hydraulic) (YYYY – Present)

1XX SERIES

100 SERIES

PRODUCED: YYYY – YYYY
HWH® 100 Series, Lever-Controlled Hydraulic Leveling System
(Four-Lever Control with Separate Indicator Light Panel with Rocker Switch or Toggle Switch)

PRODUCED: YYYY – YYYY
HWH® 100 Series, Lever-Controlled Hydraulic Leveling System
(Three-Lever Control with Separate Indicator Light Panel with Rocker Switch or Toggle Switch)

• 100 Series uses separate indicator light panel >>>
• Single-slot in the control unit bezel plate for each lever.
• Single lever control for each jack.

Without HWH® Suspension Air Dump

With HWH® Suspension Air Dump

With Toggle Switch
(OBSOLETE)

With Rocker Switch

• Indicator lights are on a plate mounted SEPARATE from the control unit.

• Used with straight-acting or kick-down jacks.

PRODUCED: YYYY – YYYY
HWH® 110 Series, Lever-Controlled Hydraulic Leveling System
(Four-Lever Control with Integrated Indicator Light Panel with Rocker Switch or Toggle Switch)
(With or Without HWH® Suspension Air Dump)

PRODUCED: YYYY – YYYY
HWH® 110 Series, Lever-Controlled Hydraulic Leveling System
(Three-Lever Control with Integrated Indicator Light Panel with Rocker Switch or Toggle Switch)
(With or Without HWH® Suspension Air Dump)

PRODUCED: YYYY – YYYY
HWH® 110 Series, Lever-Controlled Hydraulic Front Jack Equalization System
(Lever Control with Integrated Indicator Light Panel with Rocker Switch or Toggle Switch)

Without HWH® Suspension Air Dump

With HWH® Suspension Air Dump

• Single lever control for each jack.
• Single slot in the control unit bezel plate for each lever.
• Special control unit & light plate for fifth wheels and travel trailers.
• Used with kick-down or straight-acting jacks.
• Indicator lights are integrated into the slotted bezel plate covering the control unit.

2XX SERIES

PRODUCED: YYYY – YYYY
HWH® 200 Series, Joystick-Controlled Hydraulic Leveling System
(with BI-AXIS® Control and Separate Indicator Light Panel)
(With or Without HWH® Suspension Air Dump)

• 200 Series uses separate indicator light panel >>>
• Single joystick control for all four jacks.
• One front store lever and one rear store lever.
• Control unit bezel plate has a cross slot.

Without HWH® Suspension Air Dump

With HWH® Suspension Air Dump

• Indicator lights are on a plate mounted SEPARATE from the control unit.

• Used with kick-down or straight-acting jacks.

PRODUCED: YYYY – YYYY
HWH® 210 Series, Joystick-Controlled Hydraulic Leveling System
(with BI-AXIS® Control and Integrated Indicator Light Panel)
(With or Without HWH® Suspension Air Dump)

PRODUCED: YYYY – YYYY
HWH® 225 Series, Joystick-Controlled Hydraulic Leveling System
(with BI-AXIS® Control and Integrated Indicator Light Panel)
(With or Without HWH® Suspension Air Dump)
(With or Without Control Console)

• Single joystick control for all four jacks.
• One front store lever and one rear store lever.
• Control unit bezel plate has a cross slot.
• Indicator lights are integrated into control unit bezel plate.
• 210 Series has mercury level sensor.
• 225 Series has electronic level sensor.
• Used with kick-down or straight-acting jacks.

3XX SERIES

PRODUCED: YYYY – YYYY
HWH® 300 Series, Touch Panel-Controlled Air Leveling System
(with MANUAL BI-AXIS® Control)

PRODUCED: YYYY – YYYY
HWH® 305 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)

PRODUCED: YYYY – YYYY
HWH® 310 Series, Rocker Switch-Controlled Hydraulic Leveling System
(with Three-Point Rocker Switch Control)
(Designed for Safari® Motorhomes Only) (Motorized)

PRODUCED 1995 – 2003
HWH® 310 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)
(Designed for Motorized & Non-Motorized Vehicles)

PRODUCED: YYYY – YYYY
HWH® 310 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)
(With Hand-Held Pendant Type Controller)
(Designed for Non-Motorized Vehicles) (Straight-Acting Jacks Only)

• Without HWH® Suspension Air Dump

• With HWH® Suspension Pilot Air Dump

• Control Box is 2-3/4″ x 4-1/4″ x 7-1/2″

• Touch Panel
• Heading: “HWH HYDRAULIC LEVELING”
• Touch panel with a rabbit at the bottom is for vehicles with “Pilot Air Dump”.
• Jacks will retract automatically with “STORE” button.
• Used with kick-down or straight-acting jacks. (Pendant SA jacks only.)

PRODUCED: 2003 – PRESENT
HWH® 325 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)
(Long PC Board Series)

PRODUCED: 2003 – 2004
HWH® 325 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)
(Short PC Board Series)

PRODUCED: YYYY – YYYY
HWH® 325 Series, Touch Panel-Controlled Hydraulic Leveling System
(with MANUAL BI-AXIS® Control)
(with Hand-Held Pendant Type Controller)
(Designed for Non-Motorized Vehicles)

FRONT

BACK

• Touch Panel
• Heading: “HWH HYDRAULIC LEVELING”
• With or Without HWH® Suspension Air Dump
• Touch panel does NOT have “NOT IN PARK/BRAKE” indicator light.

• Touch panel has four connectors on back.
• Touch panel has one three-amp fuse on the back.

• Short PC Board
• Control box has an 8.5″ x 11″clear plastic cover.
• Electronic (rectangular) level sensor is mounted inside control box.

FRONT

BACK

With
HWH® Suspension Air Dump

Without HWH® Suspension Air Dump

• Touch panel has one five-pin connector on back.

• Long PC Board
• Electronic level sensor is mounted inside control box.
• Control box has an 8.5″ x 11″ clear plastic cover.

• Touch Panel
• Heading: “HWH HYDRAULIC LEVELING”
• “NOT IN PARK/BRAKE” indicator light.

4XX SERIES

PRODUCED: 1985 – 1992
HWH® 400 Series, Computer-Controlled Hydraulic Leveling System
(with NON-BIAXIS® Paddle Switch Control)
or (with BI-AXIS® Paddle Switch Control)

NON BI-AXIS®
(Standard)

BI-AXIS®
(A few manufactured for Holiday Rambler®)

• Control panel equipped with paddle switches.
• Air suspension dump optional.
• Some control panels may be labeled “A&E”.
• Hydraulic pump and manifold separate.
• Used with kick-down or straight-acting jacks.
• 400 Series control panel looks like no other HWH® system control panel.
• Available in BI-AXIS® or NON BI-AXIS®

5XX SERIES

PRODUCED: 1988 – 1993
HWH® 500 Series, Computer-Controlled Air Leveling System
(with Four-Point BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 500 Series, Computer-Controlled, Air Leveling System
(with Three-Point Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 500 Series, Computer-Controlled Air/Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 500 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

FRONT

BACK

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”.

• Touch panel has a forty-pin connector on back.

• Glass or blade style fuses may be found in a 500 Series control box.
• Control box is 3-1/2″ x 9″ x 14-1/2″.

• Used for Air Leveling or combination Air/Hydraulic Leveling.
• Connecting cable between the control box and touch panel is a 2″ wide, flat, forty-pin ribbon cable.

PRODUCED: 1990-1/2 – 1993
HWH® 510 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”

Touch panel has either
a forty-pin connector on back
(OR) an eight-wire connector on back.

Control box is 2-3/4″ x 4-1/4″ x 6-1/2″

• Connecting cable between the control box and touch panel was a
2″ wide, flat, 40 pin ribbon cable (early models) or a 3/8″ wide, flat, eight-wire ribbon cable.
• The hydraulic pump and manifold are separate units connected with a high pressure hose and return line.

6XX SERIES

PRODUCED: 1988-1993
HWH® 600 Series, Computer-Controlled Air Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 600 Series, Computer-Controlled Air/Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 600 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”.
• STORE function.
• Air dump optional.
• Air systems have DUMP & RAISE feature.

Touch panel has an eight-wire connector on back.

• Only blade style fuses will be found in a 600 Series control box.
• Control box is 3-1/2″ x 9″ x 14-1/2″.

• Connecting cable between the control box and the touch panel is 3/8″ wide, flat, eight-wire ribbon cable.
• Used for Air Leveling, Hydraulic Leveling, or combination Air/Hydraulic leveling.

PRODUCED: 1992 – 1993
HWH® 610 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)
(NON-Central Ground)

PRODUCED: 1993 – 2003
HWH® 610 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)
(Central Ground)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• STORE function.

Touch panel has an eight-wire connector on back.

Control Box is 2-3/4″ x 4-1/2″ x 6-1/2″.

• Connecting cable between the control box and touch panel is a 3/8″ wide, flat, eight-wire ribbon cable.
• The warning switch harness at each jack has one plug only. It may be a one-wire or two-wire connector.
• The pump and manifold are one assembly.

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”.

Touch panel has one eleven-pin connector on back.

• Control Box is 2-3/4″ x 4-1/2″ x 7-1/2″.
• Central ground.

• Connecting cable between the control box and touch panel is an eleven-pin cable assembly.
• The warning switch harness at each jack has two plugs, one single-wire and one two-wire connector.
• The pump and manifold are one assembly.

PRODUCED: 2003 – PRESENT
HWH® 625 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)
(Programmable Sensing Unit)

PRODUCED: 2006
HWH® 625S Series, Leveleze® Single-Step Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)
(Programmable Sensing Unit)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• Lower middle green indicator light is labeled “TRAVEL MODE” not “TRAVEL”.

Five-pin connector on back.

• Control box has an 8″ x 11″ clear plastic cover.
• Control box is mounted to the pump tray.
• Electronic programmable level sensor is mounted inside control box.

• The jack warning switch plugs are grey.
• Used for hydraulic leveling only.

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• Touch Panel has an outline around the manual UP and DOWN arrows.
• Lower middle green indicator light is labeled “TRAVEL MODE” not “TRAVEL”.

• Touch panel has a five-pin connector on back.
• Six-pin connector may not be present on back of touch panel.

• Control box has an 8″ x 11′ clear plastic cover.
• Control box is mounted to the pump tray.
• Electronic programmable level sensor is mounted inside control box.

• Jack warning switch plugs are grey.
• Used for hydraulic leveling only.

PRODUCED: 1997 – 2002
HWH® 680 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 680 Series, Computer-Controlled Air Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 680 Series, Computer-Controlled Air/Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”

Touch panel has an eight-wire connector on back.

• Control box is 3-1/2″ x 14-1/2″ x 19″.
• Control box is 3-1/2″ deep.

• Used for Air Leveling or combination Air/Hydraulic Leveling
• Connecting cable between the control box and touch panel is a 2/8″ wide, flat, eight-wire ribbon cable.

7XX SERIES

PRODUCED: YYYY – PRESENT
HWH® 700S Series, Leveleze® Single-Step Computer-Controlled Air Leveling System
(with BI-AXIS® Touch Panel Control)

Potted Electronic Sensing Unit (above)

Potted Multiplexed Input Output Module (“MIOM”) (above)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• Lower middle green indicator light is labeled “TRAVEL MODE” not “TRAVEL”.

• Touch panel has a five-pin connector on back.
• Touch panel has a _____________ on back.

• MIOM located at each air manifold.
• MIOM replaces typical control box.
• Potted electronic (rectangular) sensing unit is
remote-mounted with three screws and three springs.

• Use for Air Leveling

PRODUCED: YYYY – PRESENT
HWH® 725 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control) (Kick-Down Jacks)

PRODUCED: YYYY – YYYY
HWH® 725S Series, Leveleze® Single-Step Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control) (Straight-Acting Jacks)

PRODUCED: YYYY – YYYY
HWH® 725S Series, Leveleze® Single-Step Computer-Controlled Hydraulic Leveling and Landing Gear System
(with BI-AXIS® Touch Panel Control) (Straight-Acting Jacks)

Potted Electronic Sensing Unit (above)

Potted Multiplexed Input Output Module (“MIOM”) (above)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• Touch panel “manual” operations enclosed with white outline.
• Lower middle green indicator light is labeled “TRAVEL MODE” not “TRAVEL”.

• Touch panel has a five-pin connector on back.
• Touch panel has a ________ on back.

• MIOM mounted on pump.
• MIOM replaces typical control box.
• Potted electronic (rectangular) sensing unit is remote-mounted with three screws and three springs.

• All 725 Series are Single-Step, unless they have kick-down jacks.
• Can have Auxiliary Hand-Pump Control.
• Use for Hydraulic leveling.

2000 SERIES

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Hydraulic Leveling and/or Landing Gear System
(with BI-AXIS® Touch Panel Control) (for Non-Motorized Towable Vehicles)

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Air Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Air/Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 2000S Series, Leveleze® Single-Step Computer-Controlled Air Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 2000S Series, Leveleze® Single-Step Computer-Controlled Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control)

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Precision Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control, for Motorized Vehicles)

PRODUCED: YYYY – YYYY
HWH® 2000 Series, Computer-Controlled Precision Hydraulic Leveling System
(with BI-AXIS® Touch Panel Control, for Non-Motorized Vehicles)

• Touch Panel
• Heading: “HWH COMPUTERIZED LEVELING”
• Lower Middle green indicator light is labeled “TRAVEL MODE” not “TRAVEL”.

Touch panel has a five-pin connector on back.

• Control box has an 8″ x 11″ clear plastic cover.
• Control boxes are stacked.
• Electronic (rectangular) level sensor is mounted inside of control box.

• Use for Air Leveling or combination Air/Hydraulic Leveling.
• Can have Auxiliary Hand-Pump Control.

HAND-PUMP

PRODUCED: YYYY – YYYY
HWH® 2-Point Landing Gear System – Hand/Electric Pump
(Toggle/Momentary Switch-Controlled) or (Rocker/Momentary Switch-Controlled)
(Remote Operating Panel)
(Electric Motor / Solenoid Pump) (Manual Hand Pump as Back-Up)
(ML42337)

PRODUCED: YYYY – YYYY
HWH® 4-Point Leveling / Landing Gear System – Hand/Electric Pump
(Computer-Controlled Touch Panel Full Leveling) (Remote Operating Panel)
(Electric Motor / Solenoid Pump) (Manual Hand Pump as Back-Up)
(ML43108)

PRODUCED: YYYY – YYYY
HWH® 4-Point Leveling / Landing Gear System – Hand/Electric Pump
(Hydraulic Switch-Controlled Leveling) (Operation at Pump)
(Electric Motor Pump) (Manual Hand Pump as Back Up)
(Optional Leveleze® Indicator Light Package)
(ML42335)

PRODUCED: YYYY – YYYY
HWH® 4-Point Leveling / Landing Gear System – Hand/Electric Pump
(Hydraulic Switch-Controlled Leveling) (Operation at Pump)
(Manual Hand Pump – No Motor) (NO ELECTRIC POWER REQUIRED)
(ML42336)

PRODUCED: YYYY – YYYY
HWH® 4-Point Emergency Jack System
(Toggle Switch-Controlled) (Remote Pendant Operating Panel)
(No Indicator or Warning Lights)
(Electric Motor Pump) (Manual Hand Pump as Back Up)

(Operator Manual# ML46130)
PICTURE – GET FROM MP35.9953

ACTIVE AIR SUSPENSION

HWH® Active Air Suspension & Computer-Controlled Air Leveling System
(with BI-AXIS® Control )
(with Color LCD Control Module Panel) or (with Monochrome LCD Control Module Panel)
(Hydraulic Leveling Optional)

PICTURE
COLOR LCD

PICTURE
MONOCHROME LCD

PICTURE
CONTROL MODULE
SENSING UNIT