Hewland oil capacity

[Bill Maisey]

Mk9 in '69 vintage FF. Refresh my memory on oil capacity required. It has been 20 years since I owned a FF. Old Hewland manual says 2 PINTS. THis cannot be right, Right?

[rickb99]

Well, 2 pints is sorta the same as saying 1 quart.

We have the MK 8/9 in our 89SF Reynard. But it's a custom casting and DOES take 2 quarts (one back in on gear changes).

BUT, for a 'standard' MK 8/9 it is just 2 pints (1 quart)

See chart at bottom of page.

http://racing-stuff.com/gearbox.htm

2nd source confirms the manual. On the other hand, you may also want to call Taylor. I seem to recall a passing comment that they suggest using more but I've never found the place on their web site where they talk about that.

[WRD]

I would recommend closer to 1.5 quarts for a standard MK box, if you are going to run on any ovals though add an extra 1/2 quart as the oil is forced away from the ring gear for a long period of time, the additional oil will help to cool the ring and pinion.

Hope this helps.

Lee

Williams Racing Developments
www.willrace.com
858 220 0927

[Brian]

delete

[kea]

I have been adding 1 quart at each gear change, since my first Hewland Mk series box in 1971. Now with the improved lubricants (Redline Shck-Proof), I see no reason to change. Maybe, if you run an oval race series, add more.
Keith
Averill Racing Stuff, Inc.

[Charles Warner]

One quart on gear change. 1.5 quarts if the diff area was drained (I.e. CWP change)

[Brian]

To ask the obvious question (obvious to me only after reading the Hewland manual again) - If Hewland recommends 1 US quart to 1,2 US quarts from dry, and .6 US quarts top up after gear change, why have we been overfilling (?) for so long? Just because it uses up all the fluid in the bottle and you make fewer mistakes?

I do litres, so I've been happily doing even more of an overfill - if such is actually an overfill!

1 UK pint = .6 US quarts and .568 Litres (anyone's litres)

Brian

[Charles Warner]

If you want to be accurate, drill a hole in the side of the case with its bottom edge in line with the center-line of the layshaft, install a pipe plug of appropriate size, and then fill until the goop starts to flow out of the hole. Voila.