Search found 2130 matches

by db2d
Sun Jan 19, 2020 11:45 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, adding thermostart
Replies: 1
Views: 10

Re: 1965 David Brown 880UE Implematic, adding thermostart

I suggest rectifying the fault with the cold start. Remove the complete unit by undoing the large nut. Secure the unit in a vice with the T piece uppermost and then undo the smaller nut. This part can then be worked on to free it by placing the T securely in a vice. Take care not to loose any parts ...
by db2d
Sun Jan 19, 2020 11:03 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 87
Views: 2169

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

I do not think that the problem is the non-return valve If the the gear pack has been exchanged in the pump it is quite common that no oil pressure is the result. There can be substantial wear in a pump and it will still work but if new parts are fitted little or no pressure can be the result. Did y...
by db2d
Sun Jan 19, 2020 8:55 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 87
Views: 2169

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

Number 4 is a non-return valve. The pressure relief valve is situated under the large plug on the top of the valve chest ( right hand side viewed from the rear of the tractor). When the pressure relief valve relieves, oil is emitted from the hole in the centre of the plug. This can be observed throu...
by db2d
Thu Jan 16, 2020 9:43 pm
Forum: DBTC Forum
Topic: Purchased a Cropmaster - Have a few questions
Replies: 10
Views: 818

Re: Purchased a Cropmaster - Have a few questions

There is a Cropmaster flywheel for sale on the website mentioned above.
by db2d
Wed Jan 15, 2020 7:12 am
Forum: DBTC Forum
Topic: Cropmaster petrol to diesel
Replies: 18
Views: 5997

Re: Cropmaster petrol to diesel

As Ollek suggests please start a new topic to hopefully avoid any confusion.
by db2d
Tue Jan 14, 2020 9:14 pm
Forum: DBTC Forum
Topic: Purchased a Cropmaster - Have a few questions
Replies: 10
Views: 818

Re: Purchased a Cropmaster - Have a few questions

Try davidbrownparts.com They might have one or suggest someone.
by db2d
Tue Jan 14, 2020 8:52 pm
Forum: DBTC Forum
Topic: Purchased a Cropmaster - Have a few questions
Replies: 10
Views: 818

Re: Purchased a Cropmaster - Have a few questions

You will have to obtain a flywheel complete with gear. The flywheel you have is not machined to accept a ring gear, new gears are not available.
A flywheel from any pre 1960 petrol/TVO DB single clutch tractor would be suitable.
by db2d
Thu Jan 09, 2020 5:34 pm
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 87
Views: 2169

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

The pump has been assembled wrongly. Strip it down and rebuild it. I wonder what the problem was initially that instigated dismantling the pump ?
by db2d
Thu Jan 09, 2020 10:36 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 87
Views: 2169

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

The PTO gears are straight on all versions, it is the gears that drive the pump that can be different. I think the pump gear should be 3 7/8” diameter but I am not exactly certain without measuring one. I have just measured a helical gear and it is 3 15/16” dia. I would expect a straight toothed gea...
by db2d
Thu Jan 09, 2020 9:01 am
Forum: DBTC Forum
Topic: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?
Replies: 87
Views: 2169

Re: 1965 David Brown 880UE Implematic, how to prime transmission hydraulic pump?

Check the drive gears in the PTO unit, it could be a miss match if either the pump or the PTO unit has been changed. Earlier tractors had straight gears and later versions had helical.
by db2d
Mon Jan 06, 2020 1:48 pm
Forum: DBTC Forum
Topic: 1490 air locking
Replies: 4
Views: 151

Re: 1490 air locking

It could be the fuel is draining back to the tank if one of the valves in the lift pump is leaking.
There is a small seal in the cold start device that can easily be renewed. This seal is only available from davidbrownparts.com unless someone has old stock. It is not included in any other seal kits.
by db2d
Sat Jan 04, 2020 8:12 am
Forum: DBTC Forum
Topic: Cropmaster Clutch
Replies: 5
Views: 116

Re: Cropmaster Clutch

A pressure assembly from a non-Livedrive 900 or Implematic single drive plate clutch would be suitable for a 30D.
The 25 series tractors had originally a lighter pressure assembly.
by db2d
Fri Jan 03, 2020 8:43 pm
Forum: DBTC Forum
Topic: Cropmaster Clutch
Replies: 5
Views: 116

Re: Cropmaster Clutch

The heavier duty clutch assembly has all the springs coloured green in place of the red.
Changing the complete assembly is probably the better option. Finding the correct springs to upgrade a cover assembly would be difficult in this country but obtaining a complete replacement would not be a problem.
by db2d
Thu Jan 02, 2020 1:23 pm
Forum: DBTC Forum
Topic: 885 retard screw
Replies: 15
Views: 418

Re: 885 retard screw

I suggest checking the fuel return pipeline from the injection pump to the fuel tank for any kind of blockage or restriction.