Datatek
Well-Known Member
There is no governor on the electronically controlled version of the ZF4HP22/24.
There is no governor on the electronically controlled version of the ZF4HP22/24.
There is no governor in the P38 box. It is a sticky valve block. Or lack of oil pressure. Can't be a lot else if there are no electronic faults.
martynv8
Well-Known Member
My mechanic is Warren @ WGB Autos off London Road in Sheffield. Specialises in Landys & P38's in particular. He wont rip you off either. I'll be taking mine into him as i get the feeling my box isn't the same recently either, seems to be staying in 4th at low speed now & then & reluctant to pick up unless booted, only intermittent but better to get it looked at.
jamesmartin
Well-Known Member
i would think you definitely had a box problem ,you dont have a mechanical govenor ,but oil change can effect a worn box by the detergent effect on valve block and oneway clutches, especially if youy have a failing clutch pack ,try bradley on 01283521414
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Pete The Biker
Active Member
It may not be relevant, but I know Datatek and others always bang out about sensitivity of these beasts to voltage.
Your video shows only 13.8/13.9 volts at around 2,600rpm - shouldn't it be around 14.4 volts?
Pete
Your video shows only 13.8/13.9 volts at around 2,600rpm - shouldn't it be around 14.4 volts?
Pete
Unless you have a 4.6 fitted with an 150amp alternator you will NEVER see 14.4 volts on a P38. The maximum you will ever see is 14.2 and that would be with a alternator in tip top condition. 13.8-13.9 is pretty decent for one with a bit of use in it. Charging rate is variable not constant.
Pete The Biker
Active Member
Datatek
Well-Known Member
Sorry, I have to disagree again. If the battery is good, the alternator fitted to the P38 should show 14.2 volts withing a short time of starting when held at 2K rpm. Less could indicate a cell failing in the battery, a duff regulator in the alternator or other problems like bad connections, worn brushes, duff diode pack etc. It could also be that at some time the alternator has been changed for one with a lower output.
13.8/13.9 volts is not enough to fully charge a modern low maintenance lead calcium battery.
Regulated output voltage does not change significantly with age unless there is a fault. If the regulator is set to 14.2 volts, the alternator is fault free and the battery is OK, then 14.2 volts is what you should see
Sorry, I have to disagree again. If the battery is good, the alternator fitted to the P38 should show 14.2 volts withing a short time of starting when held at 2K rpm. Less could indicate a cell failing in the battery, a duff regulator in the alternator or other problems like bad connections, worn brushes, duff diode pack etc. It could also be that at some time the alternator has been changed for one with a lower output.
13.8/13.9 volts is not enough to fully charge a modern low maintenance lead calcium battery.
Regulated output voltage does not change significantly with age unless there is a fault. If the regulator is set to 14.2 volts, the alternator is fault free and the battery is OK, then 14.2 volts is what you should see
The charging rate depends on the battery state and demand we have been through this before. The regulator turns it up and down as required. As i understand it calcium batteries need at least 14.4 volts to promote the chemical change required to charge them. So the moral is, unless you change the regulator on you P38 don't fit a calcium battery it will never get fully charged.
Thanks for the input again recently - appreciated.
I'm pricing up various people re: recon autobox - will report back later on that...
Is my DSE worth spending £1500 on?!!! lol (haven't found a cheaper way to tow 3.5 ton yet!)
As a side issue I've always fancied front fog lights on the DSE, but the tranny cooler prevents them on the diesel auto's of course; As i contemplate a new gearbox I notice my tranny cooler is leaking slightly. Some folks fit an alternative cooler in front of the lower part of the radiator, then you can fit the fog lights
Any perceived thoughts on the wisdom of this? Presumably main issue is possibility restricting airflow to (& introducing more heat in front of) water rad.
I'm pricing up various people re: recon autobox - will report back later on that...
Is my DSE worth spending £1500 on?!!! lol (haven't found a cheaper way to tow 3.5 ton yet!)
As a side issue I've always fancied front fog lights on the DSE, but the tranny cooler prevents them on the diesel auto's of course; As i contemplate a new gearbox I notice my tranny cooler is leaking slightly. Some folks fit an alternative cooler in front of the lower part of the radiator, then you can fit the fog lights
Any perceived thoughts on the wisdom of this? Presumably main issue is possibility restricting airflow to (& introducing more heat in front of) water rad.
Datatek
Well-Known Member
The charging rate depends on the battery state and demand we have been through this before. The regulator turns it up and down as required. As i understand it calcium batteries need at least 14.4 volts to promote the chemical change required to charge them. So the moral is, unless you change the regulator on you P38 don't fit a calcium battery it will never get fully charged.
The regulator is fixed, it does not, indeed cannot, turn the voltage up and down, look at it as a voltage limiter and it makes more sense, the voltage can go below the fixed point if the demand is greater than the alternators ability to supply.
All modern batteries that are maintenance free are lead calcium, unless you fit a gel battery. The required charging voltage is in the range of 14.2 to 14.8 volts.
As i keep saying, but nobody takes notice, you can fit the fogs if you modify the bumper.
Datatek
Well-Known Member
How do you know that? Is it semi sealed??My battery is not a calcium battery. That was new last year.
No it's not sealed at all. Calcium would be sealed with a vent would they not?
Datatek
Well-Known Member
Yep. Not seen any like that for a while except on tractors. If you have 14.2 volts you could cook it on a long run
Yep. Not seen any like that for a while except on tractors. If you have 14.2 volts you could cook it on a long run
No because the regulator senses the battery voltage and adjusts the current in the field coils turning the alternator output up or down. A full charged battery will not receive a charge from the alternator but one that falls below say 12.5 volts will. 14.2 volts set point of the regulator is the maximum voltage that will be allowed to be put through the field coils and would give maximum output. This will vary, controlled by the regulator between 13.5 and 14.2 depending on the batteries state of charge and alternator charge rate needed. If the regulator had a set point above 14.2 which is regarded as the maximum charge rate for lead acid batteries, then yes it would boil the electrolite off in time.
Sorry Wammers, I guess you're referring to this post (?)
http://www.landyzone.co.uk/lz/f10/p38-front-fogs-174335-2.html
So did a photo of your bumper ever get posted??
Did I read somewhere that later (>'99) DSE tranny coolers had an electric fan on them so they could have the front fogs?
