Volvo FLYGMOTOR hydraulic drives

[lancsjohn]

please can you advise me on what viscosity oil to use?
My 9m Catalac yacht as hydraulic drive system consisting of a 1600cc 4-cylinder diesel engine called SEAPANTHER directly driving an hydraulic pump which is piped to 2 hydraulic motors made by Volvo "VOLVOFLYGMOTORS type F10C-39 " via shuttle valves for forward and reverse. I do not know the pump make but think it is a gear pump.
I have been unable to find any information about the motors on the internet and Volvo have not replied to my email. Does anybody have a similar system? or know what hydraulic oil type these motors use?
The system was flooded with water so I have flushed the system with HLP46 hydraulic oil and got the motors turning but on full revs I only get 2 knot yacht speed and reducing the revs by half still gives 1.8 knots. the motors do work in forward and reverse. I would like to get 5 Knots if possible.
I will try to attach photos of pump. I am thinking of trying a lower viscosity oil 15 or 20 viscosity oil to see if this will increase the oil flow to the motors and increase the speed on full revs of the pump. do you think this will have any effect?
Many thanks John Howarth.

 

[westernman]

please can you advise me on what viscosity oil to use?
My 9m Catalac yacht as hydraulic drive system consisting of a 1600cc 4-cylinder diesel engine called SEAPANTHER directly driving an hydraulic pump which is piped to 2 hydraulic motors made by Volvo "VOLVOFLYGMOTORS type F10C-39 " via shuttle valves for forward and reverse. I do not know the pump make but think it is a gear pump.
I have been unable to find any information about the motors on the internet and Volvo have not replied to my email. Does anybody have a similar system? or know what hydraulic oil type these motors use?
The system was flooded with water so I have flushed the system with HLP46 hydraulic oil and got the motors turning but on full revs I only get 2 knot yacht speed and reducing the revs by half still gives 1.8 knots. the motors do work in forward and reverse. I would like to get 5 Knots if possible.
I will try to attach photos of pump. I am thinking of trying a lower viscosity oil 15 or 20 viscosity oil to see if this will increase the oil flow to the motors and increase the speed on full revs of the pump. do you think this will have any effect?
Many thanks John Howarth.

I think this F11 pump might be similar.

https://vhs.nu/wp-content/uploads/2019/09/f11-f12-125667.pdf

From this document:-

"Hydraulic oils type HLP (according to DIN 51524), oils type A for automatic gearboxes and API CD engine oils can be used. Synthetic and non-flammable fluids (when used at lower performance) may also be suitable. Contact Parker Hannifin for information on the following:- Hydraulic fluid specifications- Fire resistant fluids."

Edit:

This might be the right one and is in English:-

https://images.solutions.parker.com...51e8-4712-837b-88c078527187}_F10_Brochure.pdf

 

[lancsjohn]

many thanks for the F10 info it looks to be the type they must have taken over from Volvo. I will try some viscosity 15 hydraulic oil and see what yacht speed it gives.
I will post the result.
thanks again for your fast reply.
best regards John

 

[Boat2016]

Try here, they were always the go to place for hydraulic propulsion.

Hydraulic Propulsion - ARS Anglian Diesels Limited

 

[lancsjohn]

I have been checking the rpm of the twin 3 bladed props on my 9M catalac which as hydraulic drive motors, with the diesel engine driving the hydraulic pump at 1900rpm the propellors are at 360rpm which only gives about 2 knots boat speed on the water, can anybody tell me what propellor rpm and boat speed they get?
I don't know the pitch of my 3 bladed props at the moment, but I am hoping to get 5 knots if possible? I am going to fit a pressure gauge on the pump outlet to see what hydraulic pressure I am getting verse engine rpm it is a directly connected drive to pump.
I think the hydraulic motors can take up to 280bar pressure and reach several thousand rpm. Knowing the pump discharge pressure should help me to decide if the pump or the hydraulic motors are the problem.
Can anybody tell me what boat speed to engine rpm they get? My engine is a 4 cylinder 1600cc diesel called a SEAPANTHER.
Many thanks John

 

[scottie]

Seapanther is a watermota conversion of a Ford petrol engine

Worth doing a search on here for more information

 

[Richard.C]

I have been checking the rpm of the twin 3 bladed props on my 9M catalac which as hydraulic drive motors, with the diesel engine driving the hydraulic pump at 1900rpm the propellors are at 360rpm which only gives about 2 knots boat speed on the water, can anybody tell me what propellor rpm and boat speed they get?
I don't know the pitch of my 3 bladed props at the moment, but I am hoping to get 5 knots if possible? I am going to fit a pressure gauge on the pump outlet to see what hydraulic pressure I am getting verse engine rpm it is a directly connected drive to pump.
I think the hydraulic motors can take up to 280bar pressure and reach several thousand rpm. Knowing the pump discharge pressure should help me to decide if the pump or the hydraulic motors are the problem.
Can anybody tell me what boat speed to engine rpm they get? My engine is a 4 cylinder 1600cc diesel called a SEAPANTHER.
Many thanks John

You might wish to reach out to the guy's of "Wildling Sailing" on youtube, your system sounds very similar to the hydraulic drive on their catamaran.

 

[Motor Boat Man]

HV46 Hydraulic Oil is the recommended for these Pumps.
JSG Hydraulics www.jsghydraulics.co.uk are still able to repair these Pumps as they did with two of mine several years ago.

 

[lancsjohn]

Thanks everybody after buying a flow meter and pressure gauge and testing the pump straight back to the tank it proved to be damaged so I looked into getting it repaired but was told not cost effective as a new pump from Flowfit on ebay was less than £200 delivered so hope to fit new pump next week and hope that solves my problem.

 

[vas]

don't forget to clean the hull and props before trying to assess if certain drive-train achieves what it should

 

[Motor Boat Man]

Thanks everybody after buying a flow meter and pressure gauge and testing the pump straight back to the tank it proved to be damaged so I looked into getting it repaired but was told not cost effective as a new pump from Flowfit on ebay was less than £200 delivered so hope to fit new pump next week and hope that solves my problem.

It will be intertesting to hear how well the replacement Hydraulic Pump at that price performs as I was quoted over £4k for one a few years ago by a UK supplier.

 

[lancsjohn]

Hi the hydraulic pump from Flowfit as a euro flange and sized at 39cc per rev it was a straight forward replacement and is working fine , I have 2 hydraulic motors each rated at 39cc per rev so it gives a 2 to1 reduction engine revs at 2000 gives 1000 rev on each propellor ,and shows about 1000psi on pump discharge gauge that I fitted. and in marina gives about 6 knots boat speed on 9M Catalac . I am please with the result. Many thanks to all best regards John

 

[vas]

Hi the hydraulic pump from Flowfit as a euro flange and sized at 39cc per rev it was a straight forward replacement and is working fine , I have 2 hydraulic motors each rated at 39cc per rev so it gives a 2 to1 reduction engine revs at 2000 gives 1000 rev on each propellor ,and shows about 1000psi on pump discharge gauge that I fitted. and in marina gives about 6 knots boat speed on 9M Catalac . I am please with the result. Many thanks to all best regards John

well done, just one note of warning.
I have 100bar hydraulics running my stabilisers, at some point I thought I'd add a 62mm dia mech boost gauge to monitor pressure (guess this is what you also got). Three years down the road (with infrequent use), the internals of the gauge failed and all 30lt of hydraulic oil ended up in the bilge, not nice...
So I'd suggest you put a stop cock in front of the gauge, turn it on if you want to monitor something, and then off again so that the poor gauge doesn't get all the hammering.
Or get a proper sender and gauge combo and wire them up in dash (much more expensive solution)

cheers

V.

 

[lancsjohn]

thanks for that advice my gauge is fluid filled and rated up to 6000 psi but I will look into getting a sensor or maybe remove it now system is working ok many thanks John.