Manitou 634 breaking pins

[FBain4532]

I've a manitou 634 that keeps breaking the pin on piston end of the tilt ram.. Bushes have been replaced 7 months ago when it broke the last one and yesterday it snapped it again.. it is noticable that the pin is bending in the fork linkage before it breaks. Any suggestions?

 

[ACEngineering]

I've a manitou 634 that keeps breaking the pin on piston end of the tilt ram.. Bushes have been replaced 7 months ago when it broke the last one and yesterday it snapped it again.. it is noticable that the pin is bending in the fork linkage before it breaks. Any suggestions?

They do it if under a lot of pressure, but once they done it once they will do it more often, check the eye in the ram i not worn, bushes need full support in the hole, also the bushes on the tilt links as theirs 2 more bronze bushes and 2 hardened steel ones.

Customers that break them tend to have a spread-a-bale hanging off them or one customer had a big grain pusher and used it for pushing muck up the heap

The MLT 735 will break them too but not so easy as they are a bigger pin and shorter.

Under normal use they are both fine, assuming the links and bushes and ram eye are good.

 

[FBain4532]

They do it if under a lot of pressure, but once they done it once they will do it more often, check the eye in the ram i not worn, bushes need full support in the hole, also the bushes on the tilt links as theirs 2 more bronze bushes and 2 hardened steel ones.

Customers that break them tend to have a spread-a-bale hanging off them or one customer had a big grain pusher and used it for pushing muck up the heap

The MLT 735 will break them too but not so easy as they are a bigger pin and shorter.

Under normal use they are both fine, assuming the links and bushes and ram eye are good.

Ram end looked fine when it was bushed but now wondering if it is slightly splayed in the back of the hole. Done all the bushes in the links tho there is about 6mm gap at the side of the tilt ram in the cast link, could this link be spring slightly?

Forklift does get a sore life loading compost and lime.

 

[ACEngineering]

Ram end looked fine when it was bushed but now wondering if it is slightly splayed in the back of the hole. Done all the bushes in the links tho there is about 6mm gap at the side of the tilt ram in the cast link, could this link be spring slightly?

Forklift does get a sore life loading compost and lime.

the pins snap in the middle, so in effect they bend, this will always damage the holes in some way. the bushes must be tight fit on the edges of the ram eye both sides or it wont spread the load evenly on the pin, and will always be trying to bend it.