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smudge
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Joined: 17 Oct 2006
Posts: 106
Location: North Wales
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 Posted: Thu Mar 15, 2007 9:14 Post subject: Poor handbrake |
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My Hzj 75 has a very poor handbrake.I have a steep drive and handbrake alone will not stop truck from rolling.
I have done all usual obvious things like clean drums, change shoes, check linkages and adjust cable all to no avail.MOT coming up soon so getting desperate.Any ideas welcome.
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1990 HZJ75 trayback ute
1990 Mercedes 300te LPG converted.
1996 Mercedes e220 Cabriolet |
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| Posted: Thu Mar 15, 2007 9:14 Post subject: Google Ads keep this community free to join! |
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RADIOTWO
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Joined: 18 Nov 2005
Posts: 816
Location: GLOSSOP
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| Posted: Thu Mar 15, 2007 21:53 Post subject: Re: Poor handbrake |
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| smudge wrote: |
My Hzj 75 has a very poor handbrake.I have a steep drive and handbrake alone will not stop truck from rolling.
I have done all usual obvious things like clean drums, change shoes, check linkages and adjust cable all to no avail.MOT coming up soon so getting desperate.Any ideas welcome. |
Hi smudge
Reading between the lines, with having a steep drive, I bet most of the time you have to pull the brake on hard !
So I recon the brake cable has stretched and that why you cannot adjust it!
try a new cable
Radiotwo |
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smudge
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Location: North Wales
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| Posted: Thu Mar 15, 2007 21:59 Post subject: poor handbrake |
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No, cure is not that obvious the cable has plenty of adjustment left in it. Handbrake is tight with plenty of travel left. In fact pulling on with two hand does not cure problem. No contamination i.e fluid on shoes either!
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1990 Mercedes 300te LPG converted.
1996 Mercedes e220 Cabriolet |
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roscoFJ73
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Joined: 17 Dec 2003
Posts: 1212
Location: western australia
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| Posted: Sat Mar 17, 2007 15:13 Post subject: |
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I had this problem with my 73 series handbrake(same as all 60 and 70 series 84-95)
The shoes must suit the the radius of the drums ,if they dont ,get the shoes machined on a radial grinder.
Make sure everything is nice and clean and the moving ,especially the bellcrank are lubricated and moving freely.
Adjust the rear brake shoes till they just scrape and leave them.
Adjust the handbrake cable(it should have been slackened already) until it takes about 5-6 clicks to hold the vehicle on a slope
.
Dont worry about the rears if they are just touching.
Yank the handbrake a few times
You may need to readjust them a few days later.
I did mine about a year ago and they are just coming up for their 1st adjustment.
They are not the best handbrake I have ever had but they can be made to hold the vehicle on a steep slope
_________________
1995 HZJ75 troop carrier
1988 FJ73 with 1HZ diesel conversion.
1995 HZJ75 cab chassis
Holden Commodore V6
YAMAHA TT600R Belgarda
Triumph Rocket3 08 with Jardines and Tuneboy 
Honda XR650L
1988 HJ61 turbo diesel with windas that slide  |
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smudge
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Joined: 17 Oct 2006
Posts: 106
Location: North Wales
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| Posted: Sat Mar 17, 2007 17:05 Post subject: Poor handbrake |
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That sounds more than possible as the new shoes look like after market copies and show little uniform wear. I will certainly give that a go. Perhaps fit different shoes.
Any idea whereabouts the oil pressure needle should sit when hot? Mine seem to be a little less than half way up the gauge. But the temp gauge also seems to read low despite voltage gauge being ok. Do you know if there is an independent voltage regulator for gauge supply? Engine has 300km on it and runs very sweet otherwise. Suppose only real way is to fit gauge direct to block to see what oil pressure is?
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1990 HZJ75 trayback ute
1990 Mercedes 300te LPG converted.
1996 Mercedes e220 Cabriolet |
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roscoFJ73
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Joined: 17 Dec 2003
Posts: 1212
Location: western australia
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| Posted: Sun Mar 18, 2007 0:37 Post subject: Re: Poor handbrake |
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| smudge wrote: |
That sounds more than possible as the new shoes look like after market copies and show little uniform wear. I will certainly give that a go. Perhaps fit different shoes.
Any idea whereabouts the oil pressure needle should sit when hot? Mine seem to be a little less than half way up the gauge. But the temp gauge also seems to read low despite voltage gauge being ok. Do you know if there is an independent voltage regulator for gauge supply? Engine has 300km on it and runs very sweet otherwise. Suppose only real way is to fit gauge direct to block to see what oil pressure is? |
Afternarket or originals wont matter. As the drums wears or is machined you need to use the right shoes.
You can usually get oversize brake shoes with a thicker lining.
Oil pressure gauges are notoriously inaccurate but yours sounds about right.
They normally fail at the sensor on the block just forward of the starter.
Something like 34 Toyota models use this same sensor.(I paid about $30)
If you want an accurate reading ,remove the sensor and plug a temporary mechanical gauge in .It should hold 50 psi min when warm at 2500 for a minute. My new engine got 80psi
Its ok if they get 4 psi at idle.
The real problem is when they go sky high at start up and drop away to nothing when warmed up. This means worn main bearings.
There no independent voltage regulator that I know of. When the alternator packs it in ,it causes the gauges to spike.
I have 2 landcruisers with 1HZ engines and they have the temp sensors in different places.
The 73 series has the temp sensor on the water outlet to the radiator and the guage fluctuates .
The 75 has the sensor on the block somewhere and sits just under half and doesnt move much
_________________
1995 HZJ75 troop carrier
1988 FJ73 with 1HZ diesel conversion.
1995 HZJ75 cab chassis
Holden Commodore V6
YAMAHA TT600R Belgarda
Triumph Rocket3 08 with Jardines and Tuneboy
Honda XR650L
1988 HJ61 turbo diesel with windas that slide |
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roscoFJ73
*******
Joined: 17 Dec 2003
Posts: 1212
Location: western australia
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| Posted: Sun Mar 18, 2007 0:40 Post subject: Re: Poor handbrake |
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| roscoFJ73 wrote: |
| smudge wrote: |
That sounds more than possible as the new shoes look like after market copies and show little uniform wear. I will certainly give that a go. Perhaps fit different shoes.
Any idea whereabouts the oil pressure needle should sit when hot? Mine seem to be a little less than half way up the gauge. But the temp gauge also seems to read low despite voltage gauge being ok. Do you know if there is an independent voltage regulator for gauge supply? Engine has 300km on it and runs very sweet otherwise. Suppose only real way is to fit gauge direct to block to see what oil pressure is? |
Afternarket or originals wont matter. As the drums wears or is machined you need to use the right shoes.
You can usually get oversize brake shoes with a thicker lining.
Maybe your drums are worn out .THey only allow 1mm I think.
They cost about $40-60 each here for aftermarket.
60 series should fit as they have the same brakes
Oil pressure gauges are notoriously inaccurate but yours sounds about right.
They normally fail at the sensor on the block just forward of the starter.
Something like 34 Toyota models use this same sensor.(I paid about $30)
If you want an accurate reading ,remove the sensor and plug a temporary mechanical gauge in .It should hold 50 psi min when warm at 2500 for a minute. My new engine got 80psi
Its ok if they get 4 psi at idle.
The real problem is when they go sky high at start up and drop away to nothing when warmed up. This means worn main bearings.
There no independent voltage regulator that I know of. When the alternator packs it in ,it causes the gauges to spike.
I have 2 landcruisers with 1HZ engines and they have the temp sensors in different places.
The 73 series has the temp sensor on the water outlet to the radiator and the guage fluctuates .
The 75 has the sensor on the block somewhere and sits just under half and doesnt move much |
_________________
1995 HZJ75 troop carrier
1988 FJ73 with 1HZ diesel conversion.
1995 HZJ75 cab chassis
Holden Commodore V6
YAMAHA TT600R Belgarda
Triumph Rocket3 08 with Jardines and Tuneboy
Honda XR650L
1988 HJ61 turbo diesel with windas that slide |
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