Evo Cymru
Member
- Messages
- 688
Afternoon all,
Since buying my Gransport about 4 years ago I have always routinely checked the hydraulic pump and recycle times for the robotizied gearbox. Gradually over time, the 'cycle' time has reduced until now it is around 30 secs at idle - not good and about time I dealt with it I think, though the car drives fine.
The Advanced Electronics manual states:
In the case of hydraulic problems use the following procedure in order to isolate the
offending component:
Key ON, Engine Off: the interval time between two pump activations must be no less
than 2 minutes.
Key On, Engine running: the interval time between two pump activations must be no
less than 60 seconds. This makes it possible to check the clutch solenoid valve and, by
acquiring the pump restart times, the condition of the accumulator.
The conditions of the electric pump can be assessed by acquisition of its activation
time: an activation ramp with an increasingly gradual slope and activation time in
excess of 5 seconds are clear symptoms of deterioration of the pump.
My feeling is that the pump is fine (I replaced it several years ago and it runs for less than 5secs to build the pressure back up) so the pressure accumulator or one of the solenoids may be leaking internally. If I take it to a specialist I'm hoping they should be able identify which of these it would be (or indeed something else) using the SD3 reader. Before I do this though I thought I would check with the Maserati Massive on here to see:
1. Has anyone had the solenoids refurbished at all? Each unit is quite expensive and I'm sure I remember a few years ago someone in Europe working on them?? My thinking is that it maybe it would be worth looking at them all at the same time rather than wait for another one to go? Are they even a common failure point??
2. Same for the pressure accumulator - are they able to be refurbished or is it wiser just to get new?
3. Upgrades - anyone looked at improving the system at all? I believe the Ferrari accumulator used on the 360 is a different design (as is the pump as well) - possibly better?
I'll obviously report back on the specialist findings but it set my mind to pondering about how to make the system a bit more robust/bullet proof. Any thoughts?
Olly
Since buying my Gransport about 4 years ago I have always routinely checked the hydraulic pump and recycle times for the robotizied gearbox. Gradually over time, the 'cycle' time has reduced until now it is around 30 secs at idle - not good and about time I dealt with it I think, though the car drives fine.
The Advanced Electronics manual states:
In the case of hydraulic problems use the following procedure in order to isolate the
offending component:
Key ON, Engine Off: the interval time between two pump activations must be no less
than 2 minutes.
Key On, Engine running: the interval time between two pump activations must be no
less than 60 seconds. This makes it possible to check the clutch solenoid valve and, by
acquiring the pump restart times, the condition of the accumulator.
The conditions of the electric pump can be assessed by acquisition of its activation
time: an activation ramp with an increasingly gradual slope and activation time in
excess of 5 seconds are clear symptoms of deterioration of the pump.
My feeling is that the pump is fine (I replaced it several years ago and it runs for less than 5secs to build the pressure back up) so the pressure accumulator or one of the solenoids may be leaking internally. If I take it to a specialist I'm hoping they should be able identify which of these it would be (or indeed something else) using the SD3 reader. Before I do this though I thought I would check with the Maserati Massive on here to see:
1. Has anyone had the solenoids refurbished at all? Each unit is quite expensive and I'm sure I remember a few years ago someone in Europe working on them?? My thinking is that it maybe it would be worth looking at them all at the same time rather than wait for another one to go? Are they even a common failure point??
2. Same for the pressure accumulator - are they able to be refurbished or is it wiser just to get new?
3. Upgrades - anyone looked at improving the system at all? I believe the Ferrari accumulator used on the 360 is a different design (as is the pump as well) - possibly better?
I'll obviously report back on the specialist findings but it set my mind to pondering about how to make the system a bit more robust/bullet proof. Any thoughts?
Olly