Arriving home after a few weeks away is never easy, there are all those unfinished jobs you left behind just waiting there, there are those new jobs to correct problems that occurred while you were away and on this occasion the jobs that appeared on the whiteboard while I was away. I should have just taken her with me :lol:
Needless to say, I've been busy since I got home...
I left to go prospecting in the north because of the wet weather here in Cue. It was a good move because I had great weather up there while the rain continued to fall here. After receiving my pfizer jab I returned home and brought the sunshine with me. The ground has dried out but I've been too busy on other tasks to get the dryblower out. We are due to go away again so that will have to wait....on the list for when we get home
When we originally built the bus about 8 years ago it was on 31" tyres.
That had to change because we need singles in the bush. The dual wheels carry load well but are not the best offroad where we need to be in the search of gold and treasure.
Because we were working with Hummers at the time I converted a set of 16.5" Hummer wheels to fit the Isuzu and for the first few years we rode on 35" tyres. They did the job to some extent but failed to carry the excess weight inevitable after a successful fossicking or prospecting trip. Finally I decided to bite the bullet and purchased a set of 17" wheels fitted with 37" tyres. These tyres gave us an extra 500kg of load carrying capacity as well as a bit more ground clearance.
There's always a downside and in this case it was the gearing. The extra size of the new wheels and tyres meant that we lost the slow crawling ability in the bush and the cruising speed on the highway was not at the ideal engine speed for best performance. That left me with two choices, the first was to recut a couple of gears in the transfer case to change the output speed, the second was to purchase replacement diffs in the correct ratio. I would have preferred to remove the transfer case from our other Isuzu truck, modify it and then swap it into the bus. As the truck had been stolen that choice went out the window so I went looking for diffs. I found a set of diffs at Cosgroves in NSW but difficulties with the purchase and items supplied meant that that transaction took nearly two years to complete.
That was my first job when I got home. I started with the rear diff. It's big and heavy but at least the bus has heaps of ground clearance so the job could be done with the wheels on the ground. With a bit of help from Mrs M to steer the trolley jack and lower it to the ground we removed the old diff and prepared to install the new one. Close inspection revealed that the diffs were different, the centre carrier gear set on the replacement diff was offset to one side. That meant if I was to fit this diff I was going to have to find a long and a short axle to match, an almost impossible task. That left me with the task of changing the centre gear carrier from one diff to the other. It shouldn't have been too difficult but Isuzu in their wisdom fixed the crown wheel with E-Torx type bolts that I found impossible to remove with conventional tools. I purchased the correct sockets, made a slight modification to the socket and carried out the job. It took a few days but the rear diff was done.
After removal of the front diff I was very careful to check the gear set, it was correct. The job seemed simple enough, the diff was still too heavy to handle without the use of the jack but I knew I could handle that since we'd done the rear one. After installing the diff I went to fit the propeller (tail) shaft. I thought it was going a bit too easy, the attachment flange was different on the new diff. Just another hurdle but a bit of muscle and a special home made tool and the job was completed
The final drive ratio has changed from 5.4:1 to the new 6.1:1 improving our gear ratio by about 10%. That meant another short trip away to prove my work before heading out on our next adventure north
I'll tell you about that soon but right now I'd better get back to work, I'm packing up
layful: