• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)
Tips
Tips

Throttle return mechanism on the BN1

catfood

Jedi Knight
Offline
Was there any form of return spring fitted to the throttle levers other than the springs fitted on the ends of the carburettor throttle shafts? These seem a little weak to return the throttle pedal given the complexity of the lever mechanism on the RHD cars. One of the levers on my car (the one going from bulkhead to carbs) has a small bracket on it at the carb end that looks like it could have had a spring hooked in but there is no obvious place to connect the other end of a spring. Originally the car had a mackled together spring mechanism that is obviously not original.

Cheers
 

CraigC

Jedi Trainee
Country flag
Offline
Yes, there is a return spring on the horizontal linkage rod. It sounds like yours is installed backwards. The bent metal bracket should be at the rear. The spring hooks into it and goes forward. The forward end of spring is connected to a hole in the linkage pivot on the exhaust manifold by a short length of bent metal rod. I am not sure this actually the correct connection as it looks a bit suspect, but it is the way it was in 1963 when purchased by my Dad. The spring and bracket are #51 and #52 on this Moss Motors illustration https://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=28872. They don't show the connection at forward end of spring. I suspect it must have been something similar to the rear bracket.

Here is a pic of the rear.

20170917_095334.jpg








.
 
OP
catfood

catfood

Jedi Knight
Offline
That explains a lot. I have part 31 in the link above on upside down. I've been looking at photos online of lhd cars which show a lever pointing upwards from the bulkhead wheras it points down on rhd models. Mounted the other way up the position of the spring hook makes more sense. Thanks for your help.
 

CraigC

Jedi Trainee
Country flag
Offline
From the inset pic on the Moss page, it is clear that the RHD setup has the bellcrank on left footbox oriented differently than the LHD cars, but it still moves backwards to open and spring pulls it forward to close.

Part 31 in link is the pivot pin for the front bellcrank. Are you saying you have that bellcrank on upside-down?
 
Similar threads
Thread starter Title Forum Replies Date
R TR2/3/3A Carb throttle return spring tension Triumph 2
apbos H1 carbs and throttle return spring? PS BillM this pic is for you! Spridgets 5
D TR6 76 TR6 Throttle Return Triumph 8
E throttle return springs Austin Healey 3
R TR2/3/3A TR3 THROTTLE RETURN SPRING? Triumph 11
T TR2/3/3A TR3 Throttle linkage return spring Triumph 3
58Custom How many throttle return springs? Spridgets 1
Stig Throttle return spring location Triumph 5
19_again fourth spring on throttle return? MG 16
Baz Throttle return springs... Spridgets 86
R TR6 Throttle/Carb issues 73 TR-6 Triumph 23
Healey Nut Tri-Carb Throttle Controls Austin Healey 4
D TR2/3/3A TR3 throttle linkage bell crank. Triumph 13
Walter74 Throttle Cable Conversion Austin Healey 6
J Throttle Controls Identification Austin Healey 4
B RHD BJ8 Throttle Control Rods Austin Healey 9
K TR2/3/3A Sending out SU's for throttle shaft rebushing........ Triumph 4
C Jammed Throttle Linkage Austin Healey 3
R TR2/3/3A Throttle rod spring location Triumph 3
T BT7 throttle relay levers short and long Austin Healey 1
Michael Oritt 100 throttle linkage--help needed Austin Healey 3
D TR4/4A SU HS6 throttle spindle size Triumph 19
F TR2/3/3A Throttle linkage cross rod Triumph 4
C TR6 Carburetor Throttle Linkage Triumph 10
warwick-steve Throttle shaft bearing/bush on bulkhead Austin Healey 9
J TR2/3/3A TR3A Throttle shaft bushing retainer plates, Correct color? Triumph 2
Talon TR2/3/3A Throttle rod link to carburetor; basic questions Triumph 4
Lukens TR2/3/3A Installing a throttle. Triumph 2
K TR2/3/3A Kangarooing on light throttle Triumph 14
ckeithjordan TR2/3/3A H6 Throttle Linkage Triumph 13
RickPA Overdrive throttle switch caused meltdown Austin Healey 2
M Throttle pedal problem Austin Healey 8
bighealeysource Strange problem with throttle staying open Austin Healey 6
A Throttle Pedal Height Austin Healey 10
Bob_Spidell Throttle Bushes Austin Healey 6
T Looking for advice for throttle linkage for Weber DCOE Spridgets 2
Rob Glasgow Overdrive Throttle Switch Austin Healey 9
Rut TR4/4A SU throttle linkage and brackets Triumph 5
T Philosophizing on keeping cars for more decades - prompted by a broken throttle cable Spridgets 3
Lukens TR2/3/3A Anyone ever see a push/pull throttle mounted on the dash? Triumph 4
P Bj8 rhd cable throttle conversion - help Austin Healey 6
TomMull Shortening a throttle cable Q&D with stuff in the shop. Restoration & Tools 5
TomMull Spitfire Throttle linksge needed Triumph 10
TomMull Post-War Other Herald carpets and throttle issues Triumph 4
MY66AH Throttle Linkage Spridgets 9
doc50 TR2/3/3A Throttle sticks Triumph 8
J TR2/3/3A Need a part for the throttle shaft. Triumph 4
C Overdrive throttle switch rod connection picture Austin Healey 3
B Pics of throttle shaft reaming Austin Healey 6
B Longbridge 100-6 Throttle Linkage Pictures - Any Out There? Austin Healey 27

Similar threads

Top