Good Sam Club Open Roads Forum: Truck Campers: Happijac 4500 Fun
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Truck Campers

Open Roads Forum  >  Truck Campers

 > Happijac 4500 Fun

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
brucekr

Oregon

New Member

Joined: 07/21/2021

View Profile



Good Sam RV Club Member

Offline
Posted: 07/21/21 11:27pm Link  |  Quote  |  Print  |  Notify Moderator

Hello, new to the forum.

I recently bought a used Bigfoot camper and when we were loading it in my pickup, I could tell the jacks needed some TLC. I watched this video for the teardown and reassemble of the units:
https://www.youtube.com/watch?v=k9wKi0kO19o&t=188s

But at about 2:40 into that video, my issues arise. I can't get the motor assembly off of the jack. I've tapped on it with a hammer like the video shows...nada. I'm a little leary of breaking it, so I grabbed a section of 2x4 and a rubber mallet and I just can't seem to separate the motor housing. Any ideas on that it could be? I have of course removed the 2 screws holding it in.
In the process, I did have a slight miss and nicked a tiny piece, but think it should be ok with a little sealer.

Thanks in advance!

JimK-NY

NY

Senior Member

Joined: 05/12/2010

View Profile



Good Sam RV Club Member

Offline
Posted: 07/22/21 04:52am Link  |  Quote  |  Print  |  Notify Moderator

Just two quick comments---

First what do you mean about the jacks needing some TLC? What is wrong?

Second, disassembly and services of the jacks is not a simple matter. If you are having issues just removing the motors, you are only on the first and simplest part of a long journey.

I think I was lucky with mine. One froze and parts broke. It was easy and not especially expensive to replace the jack. I even bought a spare.

brucekr

Oregon

New Member

Joined: 07/21/2021

View Profile



Good Sam RV Club Member

Offline
Posted: 07/22/21 08:31am Link  |  Quote  |  Print  |  Notify Moderator

By TLC, I meant that the front driver side jack at first wouldn't even budge with the motor, so I had to manually crank it at first. Then at different points throughout, the motor was just more labored than the others. So I was going to clean and grease the ball screw and thread and potentially send the motor in

JimK-NY

NY

Senior Member

Joined: 05/12/2010

View Profile



Good Sam RV Club Member

Offline
Posted: 07/23/21 06:40am Link  |  Quote  |  Print  |  Notify Moderator

You are supposed to periodically run the jacks up and down a couple of times with full extension to spread out the lube. I would try that first.

Once you pull the bolt the motor should come off easily. If not, I suppose it could be corroded. More likely someone used some sort of sealant. Anyway I would start with penetrating oil.

TxGearhead

Texas

Senior Member

Joined: 04/17/2016

View Profile



Good Sam RV Club Member

Offline
Posted: 07/25/21 02:36pm Link  |  Quote  |  Print  |  Notify Moderator

Search this forum for Happi Jac lubrication.
I found it. It's a "sticky" in Truck Camper University.

* This post was edited 07/25/21 02:43pm by TxGearhead *


2018 Ram 3500 CC LB DRW 4X4 Cummins Aisin Laramie Pearl White
2018 Landmark Oshkosh
2008 Bigfoot 25C9.4
2014 NauticStar 21 ShallowBay 150HP Yamaha
2016 GoDevil 18X44 35HP Surface Drive

bigfootford

Fair Oaks, California

Senior Member

Joined: 12/03/2002

View Profile



Good Sam RV Club Member


Posted: 07/28/21 09:18am Link  |  Quote  |  Print  |  Notify Moderator

The motor and gear box should come off with some gentle tapping...If not that would be strange. I wonder if someone put the motor/gear box back on with some sealer..uggg.
My BF is 21 years old now. My jacks have been used 100's of times. I have serviced them 2 times, only the fronts. One broke the shaft keeper and was binding up. I ended up buying 2 new 4500's a couple of years ago. I have only serviced the rears one time.

Here is the link to HJ repairs....

https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/22881036.cfm

Jim


2000 2500 9.6 Bigfoot,94 F250, Vision 19.5, Mich 245/70XDS2's, Bilstein shocks, air bags/pump, EU2000, PD 9260,Lifeline 100ah, 200W. solar, Morningstar Sunsaver 15A/ display panel, Trimetric, Delorme/laptop, Holux gps rec,led lights, Wave-3 heat.

brucekr

Oregon

New Member

Joined: 07/21/2021

View Profile



Good Sam RV Club Member

Offline
Posted: 07/28/21 11:41am Link  |  Quote  |  Print  |  Notify Moderator

Appreciate the help and the links.

I got the motor off, but ended up breaking the housing and had to order a replacement from Lippert. Mine had the drive coupling release lever, but the hardware didn't match any of the tutorials that I've watched or read. There was no spring and the drive coupler was different, and it was nearly impossible to disengage the motor for manual cranking. And ultimately, I gave up trying to get the bottom gear off the shaft, so I couldn't directly grease the threaded shaft. But I can run the jack from stop to stop with my drill without any hangups, so I'll address this in the future I guess.

Just FYI, here are the part numbers and prices as of today from Happijac (Lippert).

182923 Housing (top and bottom with seal and screws) $59.95
182517 The drive coupling hardware kit (spring, etc) $8.95

The phone number I called to order the parts was 801.544.2585
I'll say that they were easy to deal with and had I called an hour earlier, my parts would've shipped that day. As it was, they shipped the next day, and in 2021 that's much appreciated.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 

Open Roads Forum  >  Truck Campers

 > Happijac 4500 Fun
Search:   Advanced Search

Search only in Truck Campers


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.