HWH Corporation
(On I-80, Exit 267 South)
2096 Moscow Road
Moscow, Iowa 52760

Phone: (563)724-3396 or (800)321-3494
Fax: (563)724-3408

Business Hours: 8 a.m. - 5 p.m. Central Time (M-F)

The World's Largest Manufacturer
of RV Leveling & Room Extension Systems
Installation Diagrams and Information

General Installation Information
Pre-installation checks - MI351006
Protection of electrical connections - MI9554
Painting & mounting instructions for landing gear & other jack assemblies - MI154755
Installation instructions for AP43594 Landing Gear Bracket Kit - MI154582
Installation of Weather Resistant Switch Box - MI159412

Final Check Out Sheets

625S Hydraulic Leveling - ML46840
2000 Air Leveling - ML32304
2000 Single Touch Air Leveling - ML46839

General Installation Manual & Component Selection for 625/625Single Step for Motorized Vehicles - ML44818

Installation Instructions for Hand pump/Electrical pumps & Landing Gear/ 5th Wheel leveling

Installation Information for Slide Out mechanisms

ML39247 - Synchronizing procedure for setup or repair of room mechanisms with sync. cylinder

MP648290 - Hydraulic line connection diagram for Universal Straight-Out room extension

MP648301 - Hydraulic line connection diagram for Universal Level-Out room extension with lift cylinders

MP648325 - Hydraulic line connection diagram for Universal Level-Out room extension with platform mechanism

MP648325 - Hydraulic line connection diagram for Universal Level-In/Level-Out room extension

MP648490 - Hydraulic line connection diagram: room extension connections at manifold, all HWH room extensions

Installation Instructions for Saddle Rack
Owners Manual - ML45707
Installation Information - MI159420

Sprinter Installation Diagrams & Photos

Jack Mounting Bracket Catalog (with diagrams)

Hose Information
Hose Swaging (Hose end to hose assembly) - ML24976
Hose Identification and assembly guide - ML24976

Jack Information
Kickdown jack horizontal and vertical adjustments - MI352518
Kickdown jack hose routing - MI352009
Jack pressure switch installation - Generic Kickdown and Straight-Acting jacks - MI352009
Jack pressure switch installation - Dodge Sprinter - AP37942 & AP37542 jack kits - MI152008
Jack pressure switch installation - 4000 lb jacks with pressure switch window - MI152102
Jack pressure switch adjustment - MI9544
6000# Kickdown jack warning switch information - MP653040
9000# Kickdown jack warning switch information - MP653045
16000# Kickdown jack warning switch information - MP653030
Straight-Acting jack warning switch information - MP653035
2.5" Landing gear installation instructions - MI154580
Installation instructions for AP43594 Landing Gear Bracket Kit - MI154582

Sensing Unit Information
Sensing Unit Adjustment - 325/625/625S/2000 - MI154550
Sensing Unit Adustment - 225 Joystick - MI154570
Sensing Unit Orientation and jumper placement - ML31215

Active Air Information
Active Air Connection Checklist - ML43258

225 Connection Diagrams
Hydraulic line connection to valve and pump - MP65
Air dump air line connections with HWH air dump valves - MP752
Electrical harness connection diagram without air dump - MP85106C
Electrical harness connection diagram with air dump - MP852005
Pump relay connection diagram - MP852015
Bezel plate connections - MP852010
Sensing Unit, Pump and Warning Switch harness connections to valve pigtails - MP85279C
Master Warning Light/Buzzer connection diagrams - MP859999

625/625S Connection Diagrams
Hydraulic line connection to manifold - Straight-Acting jacks - MP652802
Hydraulic line connection to manifold - Kickdown jacks - MP65300A
Air dump air line connections - HWH air dump valves - MP752
Electrical connection diagram - warning switches - pressure switches - park brake wiring - touch panel harness - MP85056J
Electrical connection diagram with pilot air dump - warning switches - pressure switches - park brake wiring - touch panel harness - MP85091C
Electrical connection diagram - Manifold, master relay and pump relay - MP85102K
Electrical connection diagram with pilot air dump - Manifold, master relay and pump relay - MP851035
Electrical connection diagram with HWH air dump valves - Manifold, master relay and pump relay - MP851045
Electrical connection diagram - Touch Panel - MP852930
Electrical connection diagram - Master Warning Light/Buzzer - MP85304R

Room Extension Diagrams
Room cylinder pressure switch - assembly and information - MP849961

Slimline Room Extensions with pressure switches
Electrical Connection diagram - Room Extension manifold connections - Rooms 1, 2 & 3 - MP840400
Electrical Connection diagram - Pump & Safety relay connections - MP840450.pdf
Electrical Connection diagram - Room Control Panel - MP840500.pdf