Search found 3978 matches

by ollek
Mon Apr 06, 2020 2:35 pm
Forum: DBTC Forum
Topic: 990 P.U.H lift arm
Replies: 8
Views: 100

Re: 990 P.U.H lift arm

The situation in UK might have been different but where I live , we fitted localy made PUH at the import workshop starting from around 1970 until the introduction of 90-series tractors. This was because the PUH hitch fitted by the factory in those days did not fúllfil the legal requirements (too wea...
by ollek
Mon Apr 06, 2020 1:36 pm
Forum: DBTC Forum
Topic: 990 P.U.H lift arm
Replies: 8
Views: 100

Re: 990 P.U.H lift arm

A small PUH manufacturer never stamped their name on any part of the hitch and most of the pick-up hitches are made by small companies. This also goes for bigger manufacturer of parts, such as the hydraulic cross shaft on a David Brown tractor. No markings telling you it is a David Brown made part i...
by ollek
Mon Apr 06, 2020 5:22 am
Forum: DBTC Forum
Topic: 990 P.U.H lift arm
Replies: 8
Views: 100

Re: 990 P.U.H lift arm

The PUH lift arm can be of different shape and constructions, it depends on who manufactured the PUH. It is also possibe that someone has fitted a used PUH with no lift arms to the tractor. He then had to make arms himself. It is impossible to find the correct ansver.
by ollek
Sun Apr 05, 2020 8:23 pm
Forum: DBTC Forum
Topic: Hydrashift into a synchro tractor?
Replies: 2
Views: 47

Re: Hydrashift into a synchro tractor?

I would not even think about doing what you are sugesting, it is not a job that includes only changing the gear box. You will have to at least swap the gearbox frame and the gearbox top. In additionb you will have to change the front axle for a 2wd axle and remove the cardan shaft and the drop box a...
by ollek
Sun Apr 05, 2020 6:34 pm
Forum: DBTC Forum
Topic: 880 Selectamatic Possible Overheat
Replies: 6
Views: 106

Re: 880 Selectamatic Possible Overheat

The termostat will start to open at 72 to 74 deg. C and you can not get any higher temperature in the cylinder head without working the engine under load. The engine temp, will be around 90 deg. C when the termostat is fully open. The red field in the gauge start at approx. 105 to 108 deg. C And thi...
by ollek
Sun Apr 05, 2020 3:51 pm
Forum: DBTC Forum
Topic: 880 Selectamatic Possible Overheat
Replies: 6
Views: 106

Re: 880 Selectamatic Possible Overheat

Where did you get the temp. gauge from? The temp sender at the engine and the gauge must have compatible resistanses to show correctly. You can not fit any gauge to any sender, the gauge will give wrong readings. Please have a look in the following link http://www.davidbrownparts.com/Instruments.htm...
by ollek
Sat Apr 04, 2020 8:08 pm
Forum: DBTC Forum
Topic: 1494 hydraulcs
Replies: 7
Views: 162

Re: 1494 hydraulcs

You must NOT CLEAN the pressure filter in any way as the filtering properties in it can deteriate and parts of the filter will then end up in the valves in the valve chest. Have you cleaned (removed all grease) the bottom plug and the drilling and locked the plug using Loctite 601 and have you nocke...
by ollek
Thu Apr 02, 2020 2:13 pm
Forum: DBTC Forum
Topic: Hydraulic maintenance
Replies: 4
Views: 177

Re: Hydraulic maintenance

The following link takes you to the parts catalogue page that shows the valve chest. As you can see, the plug is for the non return valve and it has to be tight. Please also note that there is a sealing washer (ref. 22) under the plug. Please remove the plug and check that the washer is in order. ht...
by ollek
Thu Apr 02, 2020 9:14 am
Forum: DBTC Forum
Topic: Hydraulic maintenance
Replies: 4
Views: 177

Re: Hydraulic maintenance

The rocker lever can move sideways and get jammed against the abutment plate, if the selector fork is broken. This can be the reason for your problem with the lift / lowering.The friction washers at the control lever shaft have to be tightened if the operating lever do not stay in position. Tighten ...
by ollek
Wed Apr 01, 2020 2:28 pm
Forum: DBTC Forum
Topic: 1494 hydraulcs
Replies: 7
Views: 162

Re: 1494 hydraulcs

What do you mean " push out the spool valve without adjusting the screws washed it with gasoline"? You can not push out the spool valve without removing the two nuts on top of the valve and you must adjust the nuts using a dial gauge as told in the instructions I have sent you. The job is not easy, ...
by ollek
Wed Apr 01, 2020 2:15 pm
Forum: DBTC Forum
Topic: 1494 hydraulcs
Replies: 7
Views: 162

Re: 1494 hydraulcs

I also think you will need to have the correct Operators Manual for your tractor. The following UK company can supply you with the correct manual http://www.davidbrownparts.com/Books%20 ... nuals.html Scroll down the page until you find the 1494 manual
by ollek
Wed Apr 01, 2020 12:16 pm
Forum: DBTC Forum
Topic: 1494 hydraulcs
Replies: 7
Views: 162

Re: 1494 hydraulcs

Have you cleaned the Hydra Shift and hydraulic suction screens and have you changed the pressure filter behind the rear axle? If not already done, clean the suction screens and change the pressure filter before you do anything else. Never use plain hydraulic oil in the transmission and avoid the use...
by ollek
Wed Apr 01, 2020 6:51 am
Forum: DBTC Forum
Topic: 1394 pto clutch
Replies: 5
Views: 138

Re: 1394 pto clutch

Well, remove the cover. Its only two bolts and nothing drops out.
by ollek
Wed Apr 01, 2020 6:41 am
Forum: DBTC Forum
Topic: 1394 4wd slipping
Replies: 1
Views: 85

Re: 1394 4wd slipping

Both the transmission and the drop box oil will drain if you remove the plug at the bottom of the drop box. You can change the dog clutch after you have removed the complete drop box.
by ollek
Wed Apr 01, 2020 6:34 am
Forum: DBTC Forum
Topic: Rear hydraulic cross shaft leak
Replies: 2
Views: 120

Re: Rear hydraulic cross shaft leak

The "hickup" you are telling about can be a result of a leaking lift cylinder piston. If the piston is leaking, then there will be too much oil in the space behind the piston and this excessive oil will leak out trough the cross shaft seals. If your tractor has a 3-way valve, lift a weight, stop the...