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AshWhite

  • Posts: 3427
TM prob
« on: June 25, 2011, 04:58:04 pm »
Started a job today and quickly became apparent that there was a problem with my set up. Started off with low pressure through wand, and very little heat. After a short while, I tried having a fiddle with the TM (hydramaster 421), when I lost pressure completely. There's water in the box, I can feel the heat in the solution hose up to about 2ft from the machine, tried reversing the hose and its exactly the same. There's water coming out when I press the button on the male connector of the machine. Also now I can't purge the air out of the machine or get any mix going. Anybody got an idea, I'm proper stuck!
Thanks,
Ash
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #1 on: June 25, 2011, 05:12:43 pm »
And now the vacuum is failing too..
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #2 on: June 25, 2011, 05:34:24 pm »
I think I'm talking to myself, however the vacuum problem is now sorted (top of waste tank box wasn't seated proiperly!) Now just the loss of pressure to deal with..
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richy27

Re: TM prob
« Reply #3 on: June 25, 2011, 05:39:43 pm »
are you a member of truckmounters forum prob more help on there also martin from hm goes on sometimes at weekends and may help you
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #4 on: June 25, 2011, 05:41:28 pm »
Yeah, good call. Its easier on here cos I've got access on my phone as I'm next to the van.
Cheers
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Mike Halliday

  • Posts: 11581
Re: TM prob
« Reply #5 on: June 25, 2011, 05:49:30 pm »
have you cleaned out all your filters? put an open QC on the front and check you are getting flow to the machine QC.... pushing the nipple does'nt give a clear indicator that you are getting flow.
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wynne jones

  • Posts: 2918
Re: TM prob
« Reply #6 on: June 25, 2011, 06:16:12 pm »
I would check orifices and filters, put some silicon grease on your pressure regulator (bullet thingy) and descale.

Sounds very much like an airlock so you can put an open ended hose on it but sometimes it's better to have some back pressure so just have your wand full on. Check your filters in your wand jets too if not already!
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Shaun_Ashmore

  • Posts: 11382
Re: TM prob
« Reply #7 on: June 25, 2011, 06:26:24 pm »
Also could be the regulator spring, I had it corrode on my 421, small 1cm spring which was a bit of a nightmare to replace.

Shaun
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #8 on: June 25, 2011, 06:32:41 pm »
Tried it with various tool attachments so its not the tool. There is an open ended pipe on the front with a lever type tap, which water flows freely from when opened. I've got a sneaking suspicion that its the hose which has packed in, if not the pump.
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derek west

Re: TM prob
« Reply #9 on: June 25, 2011, 06:58:37 pm »
do the bubble check ash, see if theres bubbles in your header tank. if you can't see in there, use your tap outlet into a bucket, see if theres bubbles coming out the tube.
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #10 on: June 25, 2011, 07:00:03 pm »
Derek, should the machine be running when I'm doing this? I'm assuming this is checking/getting rid of airlocks??
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derek west

Re: TM prob
« Reply #11 on: June 25, 2011, 07:05:17 pm »
yes machine needs to be running, your checking to see if air is getting in anywhere, usually pump seals that lets air in  but could be just loose conection etc.. check for bubbles first though.

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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #12 on: June 25, 2011, 07:57:43 pm »
Derek,
Just to clarify, I've attached a pic of the front of the machine. Are you saying by opening the tap (circled), there may be bubbles coming through the attached pipe? If so, then there are no bubbles - I've just tried it.

Thanks for all your help so far guys  :)
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derek west

Re: TM prob
« Reply #13 on: June 25, 2011, 08:04:58 pm »
yes thats the pipe ash, run the machine hot and then put pipe in bucket, wait for the water to fill up and you should see tiny tiny bubbles coming into the bucket through the pipe, if youve done all that and no bubbles then you aint got an air leek.

have you checked your water inlet filter, round the back of the mount, you'll see a Y brass connector where the pump takkes the fresh water out of the tank, in there is a little filter, mine used to get clogged up loads from silt in the fresh tank, have a look at that.

the only other things that have caused similar things on mine is the psi regulator having debris in it, caused pulsing psi and trouble getting the psi to go higher, and the latest problem i had was a sticky float switch in my header tank.
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #14 on: June 25, 2011, 08:24:02 pm »
No bubbles, and not enough silt in the Y connector filter to cause a problem. Does the pressure gauge rise when u turn the throttle regardless of whether you have a hose attached or not? I can't remember if it used to previously. Sorry to be a pain, but how did you check for the other faults?
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AshWhite

  • Posts: 3427
Re: TM prob
« Reply #15 on: June 25, 2011, 08:26:20 pm »
It will raise up to 100 psi as I open the throttle but that's it, and no water coming out of wand.
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Len Gribble

  • Posts: 5106
Re: TM prob
« Reply #16 on: June 25, 2011, 09:01:47 pm »
I’m glad I ant got one of those machines sounds far too complicated ;). (Memo to self   prim before you set off even with an open QC)
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Simon Gerrard

  • Posts: 4405
Re: TM prob
« Reply #17 on: June 25, 2011, 09:11:12 pm »
Ash,
I'm not sure where you are up to with this but for simplicity start as near the machine as possible. Put an open male in the front of the machine and start her up, do you have flow?
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derek west

Re: TM prob
« Reply #18 on: June 25, 2011, 09:11:57 pm »
sounds like maybe a blockage but definately a job for martin at hydra. when you said you were losing vaccuum, are you still? if so could it be something stupid like a loose drive belt, thats just a guess ash.

i'm guessing youve cleaned your orifices?

can't think of anything else ash, i'm out mate.
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Simon Gerrard

  • Posts: 4405
Re: TM prob
« Reply #19 on: June 25, 2011, 09:32:05 pm »
If you have flow, put a length of pressure hose on an put the open male in the end of it. You should have the same flow as you had at the machine. If not you have a problem with the quick connects.

If that's not it, put your wand on the end of your pressure hose and start the machine - note the pressure then press the trigger and see what the pressure drop is, it should only be 50 psi or so.

Simon
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