Edzin Posted January 12, 2019 Share Posted January 12, 2019 Hi, just acquired Series 3 88"on 90 chassis with 300tdi with auto box, disc brakes on tdi axles. Goes well but brake pedal needs lots of push to see any action, there is some suck at the vacuum tube so looking for best replacement servo. The servo fitted has a 12v spade connector for something ? My research shows a series 3 servo to be STC 1816, so need to decide whether to buy cheapest; about £57 + vat. unless there is a better option ? total newbie to Landyz so any advice is appreciated. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted January 13, 2019 Share Posted January 13, 2019 The wire and switch will be a warning for vacuum loss. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted January 13, 2019 Share Posted January 13, 2019 Interesting, is it an 88 or a 90? What braking system would it have? I didn't think that any series servo had a low vacuum warning system, it's possible that's a 90 servo. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted January 13, 2019 Share Posted January 13, 2019 My very late Ex MOD 109" had the switch on the servo, as well as a pedal-travel switch to indicate worn shoes or a leak and the fluid level switch. Quote Link to comment Share on other sites More sharing options...
oneandtwo Posted January 15, 2019 Share Posted January 15, 2019 On 1/13/2019 at 6:56 PM, Gazzar said: Interesting, is it an 88 or a 90? What braking system would it have? I didn't think that any series servo had a low vacuum warning system, it's possible that's a 90 servo. The hole for the sender is in the servo but normally blanked with a small Allen key grubscrew. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted January 15, 2019 Share Posted January 15, 2019 The wider question is if this is a series or a 90/defender, as this determines which part to order. Or are they the same? Quote Link to comment Share on other sites More sharing options...
oneandtwo Posted January 15, 2019 Share Posted January 15, 2019 It’s a series one. Defender servos have a forked end for the clevis pin to pedal. Quote Link to comment Share on other sites More sharing options...
Snagger Posted January 17, 2019 Share Posted January 17, 2019 On 1/13/2019 at 10:56 PM, Gazzar said: Interesting, is it an 88 or a 90? What braking system would it have? I didn't think that any series servo had a low vacuum warning system, it's possible that's a 90 servo. My '82 109 did. There is a screwed in bung in the face of the drum - that's where the pressure switch goes, just like that in the photo, and connects up to the daisy chain wiring that also connects the PWDA unit switch and the ignition switch start position to the relay and dash warning light. Quote Link to comment Share on other sites More sharing options...
Gazzar Posted January 17, 2019 Share Posted January 17, 2019 Now I know! Quote Link to comment Share on other sites More sharing options...
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