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
Gerling and Associates System Diagrams


THESE DIAGRAMS ARE SPECIFIC TO SYSTEMS ON PARTICULAR VEHICLES.  TO FIND DIAGRAMS SPECIFIC TO A VEHICLE, THE SYSTEM OR INDIVIDUAL PART NUMBERS MUST MATCH THE EQUIPMENT ON THE VEHICLE.

GENERIC DIAGRAMS MAY BE AVAILABLE.  REFER TO "GENERIC SYSTEM DIAGRAMS" ON THE PREVIOUS PAGE.

BECAUSE THERE CAN BE CHANGES TO SYSTEM COMPONENTS, DRAWINGS LISTED HERE MAY DIFFER FROM EXISTING EQUIPMENT ON A PARTICULAR VEHICLE.  IF NECESSARY, CONTACT HWH CORPORATION FOR ASSISTANCE. 

LEGEND:    

SA------------Power Extend/Spring Retract Jacks (single-acting)
PD------------Pilot Air Dump
D--------------Air Dump (HWH Valves)

System #                            System Description                                         Hyd. Diagrams        Elect. Diagrams

AP42991         625S Leveling D 4-SA Jacks                                                 MP70019                MP90178A-D
                        1-AP39492 Power Control with AP36195 Power Unit
                        2-AP42560 9,000 SA Jacks
                        2-AP38147 16,000 SA Jack

AP43982         625S Leveling 4-SA Jacks                                                     MP70095                MP90269A-D
                        1-AP41243 Power Control with AP32350 Power Unit
                        2-AP42917 9,000 SA Jacks

AP44019         625S Leveling 4-SA Jacks                                                     MP70107                MP90284A-D
                        1-AP39390 Power Control with AP36195 Power Unit
                        2-AP43876 9,000 SA Jacks
                        1-AP43878 12,000 SA Jack

AP45632         625S Leveling 4-SA Jacks                                                     MP70208                MP90410A-D
                        1-AP39390 Power Control with AP36195 Power Unit
                        2-AP43876 9,000 SA Jacks
                        1-AP38147 16,000 SA Jack

AP47513         625S Leveling 4-SA Jacks                                                     MP70334                MP90549A-E
                        1-AP44251 Power Control with AP33805 Power Unit          MP79105 Air Diagram
                        2-AP38147 16,000 SA Jacks
                        1-AP37562 24,000 SA Jack

AP51988         725 Leveling Sprinter 4-SA Jacks                                          MP70689                MP90933A-C
                        2-AP39574 4,000 SA Jacks
                        1-AP40797 4,000 SA Jack
                        1-AP40798 4,000 SA Jack
                        1-AP47473 Power Unit