[Peter Sweeney]

Mine went again today. It was playing up for the last few days so the warning signs were there but a tap on the pump with the hammer would put it back.

I was in Tunbridge Wells on my first job which I just about managed to finish. Had a four bed house to do next and really did'nt want to postpone so under JK's (exemplary) advice I took the hour drive to Brighton where Williamsons are based. They are the main import of SHurflo pumps for the UK.

Met Jim and Andrew who fixed problem but told me that this was an ongoing problem with many TM users across the country.

first thought it was either the vibration of the machine (causing the diaphram to dislodge) or as John suggested, grit was getting into the supply (through a lack of an inlilne filter).

Andrew is clearly very knowledgeable and discounted both these possibilities. Does anyone know why this happens because Williamsons are investigating and at this point they take the view that the switch itself may not be needed but as they confessed, they do not know what happens after water enters machine to be heated and pumped on so are second guessing. Would appreciate any feedback

Pete

www.oakleafcc.co.uk
www.oakleafcarpetcare.co.uk
carpet cleaning kent
 

[Mike Halliday]

so we are talking about the pump that takes the water from you fresh tank and puts it into your waterbox. it is totally separate from the actual truckmount so the operation of the truckmount has no bearing on the function of the supply pump

the T/M  has a float valve valve similar to the one found in a toilet cistern which sense the water dropping in the water box and causes the supply switch on the pump to open and start the shurflo pump.

the problems i have seen with the supply pump often come from a leak on the ballfloat which intermittently cause the pressure to drop and makes the shurflo pump to activate for a second or on a bad leak can cause a continuous pulsation

no hot water from the truckmount ever goes through the shurflo pump. and vibration from the machine will not affect the pump at they tend not to be mounted on the T/M.

[Peter Sweeney]

That makes sense Mike.

Perhaps it would be worth you speaking to the guys down there. I'm sure your could guide them and maybe they coulod help you out in the future. It's a big headache for them.

Pete

[Shaun_Ashmore]

I wish that they would make a TM that would draw water direct (direct feed liek pressure washers do) to the TM water pump therefore doing with out the shurflo and the header tank (water box)

Shaun

[Mike Halliday]

Geoff's truckmount has the water tank in a steel frame which holds the water higher than the pump so gravity feeds into the pump.

I always have my pump below the tank so i don't need a a supply pump.

Pete just buy a new pump or forget your freshtank and do a survay how many house have an outside tap and just direct feed your machine as these often do in the USA

or a check valve on the supply line would allow the T/M pump to pull the water out of the fershtank without it airlocking

[John Kelly]

Glad you got sorted Pete. I've been talking to these guys for months now about this problem. They had told me it was because the demand switch only worked on 1 amp and they were looking at a way of putting a higher ampage inline switch. Obviously no further forward.