Search found 210 matches

by rid54
Sun Feb 17, 2019 7:31 pm
Forum: DBTC Forum
Topic: 885 - Terrible Starter
Replies: 15
Views: 2887

Re: 885 - Terrible Starter

Throttle may not be the correct term for the regulator, but its the term used in DB manuals so maybe worth sticking to "throttle" to keep chat using the same term as the manuals :D That's obviously a good point! There are a number of traps waiting for you when you try to acquire terminology in a fo...
by rid54
Sun Feb 17, 2019 4:58 pm
Forum: DBTC Forum
Topic: 885 - Terrible Starter
Replies: 15
Views: 2887

Re: 885 - Terrible Starter

"regulator lever" may not be the correct british (or indeed english) name for the throttle handle on the steering column. As those engines really don't have a throttle proper (as in having av way of metering the intake air, like a petrol engine), I try to avoid the word. The regulator is inside the ...
by rid54
Sun Feb 17, 2019 3:35 pm
Forum: DBTC Forum
Topic: 885 - Terrible Starter
Replies: 15
Views: 2887

Re: 885 - Terrible Starter

If the engine runs well and does not give a lot of smoke under load, I think the baseline is OK. If you're not losing coolant in an inexplicable way, stop thinking about head gaskets and such. Cold starting diesels generally requires the max fuel delivery to be just that: max delivery. That in turn ...
by rid54
Fri Feb 15, 2019 10:09 pm
Forum: DBTC Forum
Topic: Drain 770 Tank
Replies: 7
Views: 1495

Re: Drain 770 Tank

My 880 Selectamatic has the fuel pipe leaving the bottom of the tank to a shut-off valve before making its way to the sediment bowl. Problem solved with the 770. I just disconnected the pipe at the sediment bowl and the diesel flowed out. I thought it was going to be a bigger job than envisaged. Th...
by rid54
Wed Feb 13, 2019 5:50 pm
Forum: DBTC Forum
Topic: Drain 770 Tank
Replies: 7
Views: 1495

Re: Drain 770 Tank

How is the 770 tank different from an 880 tank? I was thinking, that my 880 has a fuel shutoff valve in the line to the feed pump. This is a type of valve that can be taken apart by pulling out the valve core once a stop screw is removed. Fuel will then flow out of the valve body. A funnel or a suit...
by rid54
Fri Jan 25, 2019 9:56 pm
Forum: DBTC Forum
Topic: Voltage Stabiliser - Posotive or Negative Earth (885)
Replies: 9
Views: 1780

Re: Voltage Stabiliser - Posotive or Negative Earth (885)

Again, generally, a stabiliser cannot work without some voltage drop. To go for a 10 V output assuming 12 V input is quite "normal", but a voltage stabiliser may be set for any output - in general terms, as long as it is below the input voltage... In this particular application, 10 V is probably sui...
by rid54
Fri Jan 25, 2019 5:35 pm
Forum: DBTC Forum
Topic: Voltage Stabiliser - Posotive or Negative Earth (885)
Replies: 9
Views: 1780

Re: Voltage Stabiliser - Posotive or Negative Earth (885)

Very generally, a voltage stabiliser is supposed to give a constant output voltage of a determined value, even if the input voltage is fluctuating and/or the load is varying. If the output is not stable, it is shot and needs replacing. In your case you need a component made for use on negative earth...
by rid54
Fri Jan 25, 2019 8:53 am
Forum: DBTC Forum
Topic: Voltage Stabiliser - Posotive or Negative Earth (885)
Replies: 9
Views: 1780

Re: Voltage Stabiliser - Posotive or Negative Earth (885)

I would guess, that the only requirement here is to determine what polarity the system is, e.g. which battery pole is connected tho the chassis. I haven't ever seen a battery that is not clear on this; the + pole piece is bigger than the negative one and there are polarity signs embossed in the batt...
by rid54
Mon Jan 14, 2019 5:10 pm
Forum: DBTC Forum
Topic: 885 Fuel gauge - Wiring & general advice
Replies: 3
Views: 1126

Re: 885 Fuel gauge - Wiring & general advice

A detail: A dynamo or an alternator in this case makes no difference. Alternators can be driven at higher revs than dynamos and are normally "geared" for higher revs by having smaller belt pulleys; thus they start charging the battery quicker and keep charging even a low engine speeds. System voltag...
by rid54
Sat Jan 12, 2019 7:38 pm
Forum: DBTC Forum
Topic: Confused by warning lights.
Replies: 21
Views: 3645

Re: Confused by warning lights.

Thanks both, that was my assumption. If the light is on, it has some oil pressure at least, so that's good. Exactly the opposite !!! The light should come on when you turn the switch. When the engine fires it should go out. In a worn engine sometimes the light doesn't go out until a certain level o...
by rid54
Thu Jan 03, 2019 8:10 pm
Forum: DBTC Forum
Topic: Engine rebuild
Replies: 15
Views: 3122

Re: Engine rebuild

"Blowback" from the engine sump is not any kind of indicator unless really measured in some way. There is always a sort of "pumping" going on, with the pistons moving and causing pressure gradients to be felt in any opening into the crankcase. Normally, there are two openings; one at the top (workin...
by rid54
Thu Jan 03, 2019 7:57 pm
Forum: DBTC Forum
Topic: Stalling and starting problems 880 sel
Replies: 24
Views: 3774

Re: Stalling and starting problems 880 sel

rid54, it is not the first time you give information's that do not relate to David Brown tractor and this is very confusing. NO David Brown tractor has a filter in the fuel tank. And then about the air ingress. A common air leakage point is the seal between the glass bowl ands the lift pump frame. ...
by rid54
Wed Jan 02, 2019 9:28 pm
Forum: DBTC Forum
Topic: Stalling and starting problems 880 sel
Replies: 24
Views: 3774

Re: Stalling and starting problems 880 sel

I wonder, was the lift pump ever opened? I would guess that the mating surfaces of the pump parts must be thoroughly tight against the membrane and any small impurities could cause air ingress to the "active side" of the membrane. As has been mentioned, diesel fuel is good at escaping... If you wash...
by rid54
Tue Jan 01, 2019 2:27 pm
Forum: DBTC Forum
Topic: Stalling and starting problems 880 sel
Replies: 24
Views: 3774

Re: Stalling and starting problems 880 sel

I'd be wary to use very old fuel. The same kind of trouble happened to my 880 and it ended with the injection pump seizing, breaking the little drive shaft from the pump gear. Since the oly lubrication the pump gets is the fuel itself, it is pretty important that the fuel is in good condition. Any "...
by rid54
Fri Dec 21, 2018 8:06 am
Forum: DBTC Forum
Topic: 990 hard to start and excessive white smoke while running
Replies: 4
Views: 1203

Re: 990 hard to start and excessive white smoke while running

Check fuel delivery (check at a bleed screw on the injection pump when cranking ). Check injection timing. Checking bleed screw when cranking is an interesting idea, I saw a pretty good stream come out from the lower bleed screw on the injection pump, is this all pressure from the lift pump or some...