With the recent list threads of loose transmission output gears caused by
a loose nut and the chisel and hammer method of torquing the nut down, I
thought I would pass on the results of some recent product research I did.
The Factory workshop manual specifies that the nut is to be torqued down
to 95 foot pounds.
I just purchased a special tool for torquing down that nut. I looked at
the offerings of both Rovers North and British Pacific before making my
purchase decision.
Both offerings are aftermarket tools as the genuine Churchill tools have
been NLA for a long time.
The British Pacific tool costs $59. It is machined out of a single piece
of steel. It has a hex cap machined at the rear that takes a 7/8ths
socket. It is spaced so that a torque wrench with a 7/8ths socket will
fit nicely out the rear of the transfer case. The tool has four legs to
fit between four of the slots in the nut.
The Rover's North tool (RNT0002) costs $35 plus $5.00 for the short
removable bar handle. It is cylindrical with small legs for each of the
nut's indentations. It has a hole that runs transversely through the
tool near the rear end. The bar handle is fairly short (about a foot?).
There is no way to attach a torque wrench to the Rover's North tool. You
are supposed to insert the bar into the transverse hole near the end of
the tool and exert enough pressure to tighten the nut.
The Land Rover workshop manual states that the nut is supposed to be
torqued down to 95 foot pounds of torque. Looking at the short bar
handle I wasn't sure how that could be accomplished so I sent RN an
e-mail and asked.
The reply stated:
"The tool we supply (RNT0002) is designed for the
D.I.Y. mechanic, many of which do not possess torque wrenches."
Which of course did not answer my question of how one uses the tool to
achieve 95 foot pounds of torque.
However the reply did go on to state that RN does rent a nut tightening
tool that will allow you to use a torque wrench.
"The cost of rental is $25.00 for the first two weeks
and $25.00 per week after that. The deposit is $150.00."
Plus the renter pays shipping both ways.
Since I did not want to risk a loose output gear, I purchased my tool
from British Pacific. If I was not in a hurry I would have considered
renting the proper tool from RN (The nut was properly torqued within 5
minutes of opening the package). There is no way I would consider paying
for a tool that could not allow me achieve the Factory specified torque
on the nut.
The Rover's North two week rental period just about takes all the surface
UPS shipping time between the East and West coasts. So if you are on
the West coast you would either need to pay additional UPS shipping
charges or get the tool back to UPS the day after it arrives to avoid an
extra $25 rental fee.
Bottom line is 95 foot pounds plus a new lock tab washer prevents a large
number of gearbox/transfer case symptoms (loud whine, popping out of
gears, etc.). And it takes a special tool to achieve the factory
specified torque. Rover's North rents a tool that will do the job,
British Pacific sells a tool that will do the job. So there is no excuse
for not doing it correctly.
TeriAnn
http://www.overlander.net
The world's most complete set of links connecting Rover 4X4 owners
with Rover parts, service, accessory & sales companies world wide.
This archive was generated by hypermail 2b30 : Mon Apr 16 2001 - 19:05:06 EDT