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
Diagnostic Service/Repair Manuals

Hand Pump systems

Any hand pump system

MP440009 - Priming the hand pump; double-acting or single-acting jacks

Leveling Systems only - no slide-out information

Leveling System indentification

ML40256 Quick reference leveling system identification

Pilot air dump for hydraulic leveling

ML24343 - Pilot air dump repair for 200/310/610 leveling systems on Winnebago motor homes

200/210/225 Series hydraulic leveling systems (Joystick leveling)

ML23934 - HWH Joystick controls - manual Bi-Axis leveling - kick-down or straight-acting jacks - with/without HWH air dump - no pilot dump information

310 Series hydraulic leveling systems (Manual touch panel control)

ML13514 - HWH manual touch panel controls - Bi-Axis leveling - kick-down or straight-acting jacks - with/without HWH air dump - no pilot dump information

305/325 series hydraulic leveling systems (Manual touch panel control)

ML33832 - 305/325 HWH manual touch panel controls - Bi-Axis leveling - The touch panel DOES NOT HAVE a "Not in Park/Brake" light - with/without air dump - HWH or pilot air dump - short PC board in control box
ML37640 -325 HWH manual touch panel controls - Bi-Axis leveling - The touch panel HAS a "Not in Park/Brake" light - with/without air dump - HWH or pilot air dump - full size PC board in control box

400 series hydraulic leveling systems (Computerized paddle switch panel)

ML7879 - HWH computerized paddle switch controls - computerized automatic
leveling - individual jack control - kick-down or straight-acting jacks - with/without HWH air dump

500 series air leveling systems (Computerized touch panel control)

ML22362 - HWH computerized touch panel controls - computerized, automatic, Bi-axis four point air leveling wide ribbon touch panel cable - automotive type fuses

510 series hydraulic leveling systems (Computerized touch panel control)

ML7820 - HWH computerized touch panel control - computerized, automatic Bi-axis leveling kick-down jacks with/without HWH air leveling

600 series air leveling systems (Computerized touch panel control)

ML11148 - HWH computerized touch panel controls - computerized, automatic, Bi-axis four point air leveling narrow, modular touch panel cable - Foretravel motor homes
ML19048 - HWH computerized touch panel controls - computerized, automatic, Bi-axis four point air leveling narrow, modular touch panel cable

610 series hydraulic leveling systems (Computerized touch panel control)

ML9138 - HWH computerized touch panel controls - computerized, automatic, Bi-axis leveling NOT central grounded - single plug warning/pressure switch harness - warning switch with three wires and two Packard connectors - kick-down jacks with pressure switches - with/without HWH air dump
ML1679 - HWH computerized touch panel controls - computerized, automatic, Bi-axis leveling Central Grounded warning/pressure switch harness with two Packard connectors - warning switch with one two pin Packard connector kick-down jacks with pressure switches - with/without HWH air dump
ML1681 - HWH computerized touch panel controls - computerized, automatic, Bi-axis leveling Central Grounded warning/pressure switch harness with two Packard connectors - warning switch with one two pin Packard connector straight-acting jacks with pressure switches - with/without HWH air dump

625 series hydraulic leveling systems (Computerized touch panel control)

ML35963 - HWH computerized touch panel controls - computerized, automatic, Bi-axis leveling control box with plexiglass cover - straight-acting jacks with pressure switches - with/without HWH or pilot air dump
ML41240 - HWH single step, computerized touch panel controls - computerized, automatic, Bi-axis leveling control box with plexiglass cover - straight-acting jacks with pressure switches with/without HWH or pilot air dump

725 series hydraulic leveling systems (Computerized touch panel control)

ML48380 - HWH single step, computerized touch panel controls - computerized, automatic, Bi-axis leveling I/O module on pump assembly - straight-acting jacks with pressure switches - with/without HWH or pilot air dump

2000 series air leveling systems (Computerized touch panel control)

ML31043 -HWH computerized touch panel controls - computerized, automatic, Bi-axis, 4 point, air leveling - single two-ring CAN box with no slide-out equipment - with/without tag axle

Slide Outs with 200, 210, 310 or 610 series leveling systems

Two cylinder "Rail" slide-out w/rack sensing valve and single cylinder slide-out w/guide tubes

ML13633 - 200 series "Joystick" leveling system with one or two slide-outs
ML11570 - 200 series "Joystick" leveling system with a single two cylinder "Rail" slide-out with rack sensing valve - Winnebago Industries
ML12771 - 310 series leveling system with one or two slide-outs
ML12726 - 610 Series Leveling System with one or two slide-outs
ML11759 - 610 series leveling system with a single two cylinder "Rail" slide-out with rack sensing valve - Winnebago Industries

Two and four cylinder slide-outs with synchronizing cylinder and single cylinder "Guided" slide-out with hat channel guide

ML21958 - 200/210 series "Joystick" leveling with single slide-out - two cylinder "Rail" slide-out or two cylinder "Vertical Arm" slide-out with synchronizing cylinder - can be used for multiple slide-outs
ML21956 - 310 series manual touch panel leveling or 610 series computerized, automatic leveling with multiple slide-outs - Winnebago Industries - two cylinder "Rail" slide-out with synchronizing cylinder - two cylinder "Rail" level out slide-out with synchronizing cylinder - single cylinder "Guided" slide-out
ML23521 - 310 series manual touch panel leveling or 610 series computerized, automatic leveling with multiple slide-outs - Winnebago Industries - two cylinder "Rail" slide-out with synchronizing cylinder - two cylinder "Rail" level out slide-out with synchronizing cylinder - single cylinder "Guided" slide-out
ML23522 - 310 series manual touch panel leveling or 610 series computerized, automatic leveling with multiple slide-outs - Winnebago Industries - two cylinder "Rail" slide-out with synchronizing cylinder - two cylinder "Rail" level out slide-out with synchronizing cylinder - four cylinder slide-out with synchronizing cylinder

Slide Outs with no leveling system information

Two cylinder "Rail" slide-out w/rack sensing valve and single cylinder slide-out w/guide tubes

ML10709 - Multiple slide-outs on non-motorized vehicles - National RV
ML11573 - Multiple slide-outs on motorized vehicles

Travel Clamps (electric)

Manually controlled travel clamps

ML41035 - 225 series (Joystick) leveling system - HWH slide-out mechanisms - two rocker switch control panel
ML41213 - 325 series, 625 series or NO HWH leveling system - HWH slide-out mechanisms - two rocker switch control panel
ML41205 - Fleetwood motor homes NO HWH slide-out mechanisms or leveling system - two rocker switch control panel

Automatically controlled travel clamps

ML35976 - Fleetwood automatic travel clamp service manual - key switch panel with single rocker switch NO HWH slide-out mechanisms or leveling system
ML39511 - 325 series, 625 series or NO HWH leveling system - HWH slide-out mechanisms - key switch panel with single rocker switch - travel clamp control box number AP29038
ML41218 - 325 series, 625 series or NO HWH leveling system - HWH slide-out mechanisms - key switch panel with single rocker switch - travel clamp control box number AP40484
ML41167 -NO HWH slide-out mechanisms or leveling system - key switch panel with single rocker switch - travel clamp control box number AP34567
ML41142 - NO HWH slide-out mechanisms or leveling system - key switch panel with single rocker switch - travel clamp control box number AP40185