Does anyone know?

[planedick]

I'm experiencing the losing of bolts connecting the universal to the middle drive again. Someone told me that these bolts are of a special type. Is it true?

[79XS11F]

They are in deed listed in the manual as Special hardened steel and the manual says to not reuse them ... Myself .. I have never had an issue with them but i use lock tight on them :-)
Rob

[stoked]

Some times head bolts are made for one time use. They stretch when they are torqued and then that's the end of their life. Once loosened your supposed to get new ones. That being said I always re-used head bolts and never had a problem. Can you use lock washers maybe?

[planedick]

Lock washers

When I got Pathfinder it had the bolts that came out and they were lockwashers on them, but I don't think they are the right bolts as they are certainly not hard. When they come loose they hit the AHCS on the back of the middle drive. They get all mashed and bent yet the AHCS's show no signs of being hit. I guess the best bet is to get some grade 8 bolts for them. I was thinking maybe they were like shoulder bolts because the holes they go through is kind of big for the bolts.

[TopCatGr58]

Hey Dick,

The fiche calls them Washer based Hex Bolts, so does sound like what you are calling shoulder bolts...in other words, bolts with hex heads and built in round washer at base of hex head.

I don't remember using locktite on mine, haven't had any problems, but they were OEM!
T.C.

[planedick]

I know

TC, I know what you're talking about "washer based hex bolts" but shoulder bolts have a smooth precision shaft under the head with threads at the bottom that usually fits in a machined hole . I can get grade 8 washer based hex bolts so when I trade out this motor I'll put them in and probably use locktite too.

[snowdog51]

bolts

you don't have to use locktite on all bolts
just the ones you want to stay tight.
as ever bill