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Telco



Member Since: 30 Dec 2015
Location: Lancs
Posts: 42

2015 Freelander 2 SD4 Metropolis LE Auto Orkney Grey

As the old saying goes, "It may be filled for life but the life will be longer if it's changed"

Post #429523 31st Jan 2023 10:13 am
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MRRover75



Member Since: 13 Jan 2017
Location: Sandnes
Posts: 316

Norway 2007 Freelander 2 TD4 HSE Manual Tambora Flame

Hi,

Question:
Is there any simple way of testing the Haldex pump (gen.4) when it is out of the unit? Is at as simple as just putting 12V on the terminals and see that it is running?

Post #430007 13th Feb 2023 5:41 pm
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Bobupndown



Member Since: 26 Dec 2014
Location: Upside down behind the TV!
Posts: 2621

United Kingdom 2014 Freelander 2 SD4 GS Auto Orkney Grey

Have tested mine like this but apparently a more conclusive test is to measure the resistance using a multimeter. A good pump should be between 5-8 ohms.


https://www.haldexrepairs.co.uk/guide-gene...-shooting/ Landrover - turning owners into mechanics since 1948

2014 Orkney grey Freelander SD4 GS.
2004 Zambezi silver Discovery 2 Td5 (Gone)
1963 Surf blue Morris Mini Minor Super de Luxe (my little toy)

Post #430010 13th Feb 2023 6:06 pm
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MRRover75



Member Since: 13 Jan 2017
Location: Sandnes
Posts: 316

Norway 2007 Freelander 2 TD4 HSE Manual Tambora Flame

Hi,

Thanks for that! I have two pumps laying around. I measured them to 8 and 15 ohms first. Then I put 12V directly on them and both rotated. After that, I measured approx 5 ohms on both. They are hopefully fine, so I sent one of these to another FL2 owner in need. Hope it works Very Happy

Post #430042 14th Feb 2023 10:15 am
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merlinj79



Member Since: 13 Aug 2019
Location: San Diego
Posts: 313

United States 2008 LR2 i6 S Auto Tambora Flame

Since the pumps uses carbon brushes and were likely sitting around for a while, it's entirely reasonable that the resistance would be high initially due to a thin oxidation layer. Running the pump would rub that off, I'd be completely comfortable using those pumps.

What I might do is (after running it for a bit) check the resistance while it's warm, and then again after it cools down. As long as both are in spec, should be good.

Post #430110 15th Feb 2023 6:03 pm
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selectcase



Member Since: 06 Feb 2023
Location: Somerset
Posts: 10

United Kingdom 2007 Freelander 2 TD4 HSE Manual Tambora Flame


Telco wrote:
The original one that I took off was a square profile and the replacement was round. I did check the thickness at the time and the replacement was slightly larger across the cross-section.
The replacement has been in a year with no issues and I think I'm right in saying that it's not under any real fluid pressure?


I have just serviced my Gen 3 - 107k miles, its was all working fine but I had the diff out anyway for other reasons. Mine had the original was square section O ring. The filter and oil were pretty clean and I split the hadlex apart from the diff but the pump is properly stuck in the housing and no amount of tapping with a punch and hide mallet on the underside of the flange would remove it, so I left checking of the pump gauze as I was at the point of damaging the pump flange if I hit it any harder to remove it which would be pointless. What was interesting was that fact that the clutch pack outer housing had the letters PG or JG or something like that engraved on it?

Post #432677 23rd May 2023 11:31 am
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