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
HWH Online Technical School

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This section is meant as an educational aid and does not constitute complete technical training, if you have any questions or need clarification please email us .


Basic Hydraulic, Electrical & Air Suspension Theory used in HWH Systems

Lesson 1 - Introduction to Hydraulics
Basic hydraulic information - (Study before proceeding to Hydraulics & HWH.)

Lesson 2 - Advanced Hydraulic Theory
In-depth study of hydraulic principles critical to HWH system operation.

Lesson 3 - Introduction to Electronics
Basic electrical theory and circuits

Lesson 4 - Introduction to Air Suspensions
Basic air suspension theory and information.

Lesson 5 - CAN Technology
Introduction to CAN technology.

Lesson 6 - Air Seals
Basic air seal information.

Lesson 7 - Introduction to Leveling
Basic theory of leveling a vehicle with hydraulics or air suspension.


General HWH hydraulic, electrical & air equipment information including component identification & diagnostics

Lesson 8 - Hydraulics and HWH
Review of basic hydraulics and a detailed discussion of the adaptation of hydraulics into HWH components.

Lesson 9 - Electronics and HWH
A discussion of common and HWH specific electrical components - identification and diagnostics.

Lesson 10 - Air Suspensions and HWH
How air suspensions interact with HWH systems.

Lesson 11 - Educational manuals and papers
Manuals or papers written for the explanation and/or diagnostics of systems, components or different operations within a system or component.

Lesson 12 - General Diagnostic Techniques
General diagnostic rules for all diagnostics - electrical, hydraulic or air suspensions.


Motor Coach and Motorized Vehicle Systems

Lesson 13 - Hydraulic Leveling System Identification and Operation
How to identify different hydraulic leveling systems and the basic operation of each system. This includes all past and present systems.

Lesson 14 - Air Leveling system Identification and Operation
How to identify different air leveling systems and the basic operation of each system. This includes all past and present systems.

Lesson 15 - Active Air Suspension Systems with System Control Module
Identification and operation of the Active Air Suspension and the System Control Module.

Lesson 16 - Room Extension Identification and Operation
How to identify the different room extension mechanisms and the basic operation of each mechanism. This includes all past and present mechanisms.

Lesson 17 - Specialty Slide and Lift Mechanism Identification and Operation
How to identify different specialty mechanisms such as step covers, bed lifts or generator slides.

Lesson 18 - General Diagnostic Techniques and Information
Diagnostic and trouble shooting information along with access to service manuals.


Horse & Specialty Trailer Systems

Lesson 19 - Hydraulic Leveling & Landing Gear System Identification and Operation
How to identify different hydraulic leveling and landing gear systems and the basic operation of each system. This includes all past and present systems.

Lesson 20 - Room Extension Identification and Operation
How to identify the different room extension mechanisms and the basic operation of each mechanism. This includes all past and present mechanisms.

Lesson 21 - Specialty Slide and Lift Mechanism Identification and Operation
How to identify different specialty mechanisms such as step covers, bed lifts or generator slides.

Lesson 22 - General Diagnostic Techniques and Information
Diagnostic and trouble shooting information along with access to service manuals.


RV Trailer Systems

Lesson 23 - Hydraulic Leveling & Landing Gear System Identification and Operation
How to identify different hydraulic leveling and landing gear systems and the basic operation of each system. This includes all past and present systems.

Lesson 24 - Room Extension Identification and Operation
How to identify the different room extension mechanisms and the basic operation of each mechanism. This includes all past and present mechanisms.

Lesson 25 - Specialty Slide and Lift Mechanism Identification and Operation
How to identify different specialty mechanisms such as step covers, bed lifts or generator slides.

Lesson 26 - General Diagnostic Techniques and Information
Diagnostic and trouble shooting information along with access to service manuals.