kimchiman1000 asked:
The controls on the Bobcat 430 ZHS mini excavator that I operate has control levers that violently shake back and forth if they are bumped. They also shake sometimes when they AREN'T bumped, which can be very annoying. So I thought I'd annoy YOU with this video about it. ----------------------------RIDDLE: A man was to be sentenced, and the judge told him, "You may make a statement. If it is true, I'll sentence you to four years in prison. If it is false, I'll sentence you to six years in ...
25 responses so far ↓
1 WillieWonka928D // Dec 13, 2009 at 5:01 pm
Used Excavators
I think they did. Now they got this new M-series out and I heard from someone that used one that it’s better than the 430 I believe.
If its better than a 430 than Wow!
2 WillieWonka928D // Dec 17, 2009 at 1:19 am
Used Backhoe
Our 430ZHS doesn’t do that.
I kinda wish it did. I think its really funny. Call me crazy but it is funny isn’t?
3 hitachizaxis200 // Dec 18, 2009 at 9:48 pm
Used Backhoe
funny
4 Danny19921125 // Dec 19, 2009 at 5:05 am
Construction Equipment
if you don’t stop that controler, maybe that controler might be keep on shake for whole day
5 Danny19921125 // Dec 20, 2009 at 12:10 am
store
wow, pretty cool but annoying.
6 fox13z400 // Dec 23, 2009 at 1:59 am
Used Backhoe
wtf that is weird. Thats y I hate Bobcat’s they suck.
7 robby844 // Dec 23, 2009 at 6:12 am
Construction Equipment
my dad works for ingersoll (who bought bobcat) and the problem was too high of pressure goinog thru the pilot system.they have since “fixed” the problem.
8 markdmy // Dec 25, 2009 at 3:35 pm
Excavator
lol i ran liebherrs that do the same damn thing lol…and that one was a 30 ton
9 funnkky19 // Dec 29, 2009 at 12:57 am
Used Dozer
i no a few ladys that would love to meet them controls ha ha ha!!
10 88madlaker // Dec 31, 2009 at 10:12 pm
For Sale
i ran a 220 komatsu that did that … just with the bucket control it something in the valve bank back feeding to the controls. prolly not good for it
11 slimtim319 // Jan 2, 2010 at 7:22 am
Construction Equipment
hahaha i ran a 320 cat and my right hand leaver did that for about 10 sec.
thats really something.
12 mccormickchainsaw // Jan 4, 2010 at 8:14 am
Used Backhoe
stupid bobcrap
13 Spanrz // Jan 4, 2010 at 9:41 am
Used Backhoe
“The mechs at the Bobcat dealership cannot find anything ‘wrong’ with the controls though.”
They don’t understand the problem then.
This happens to CAT’s too. (mini excavators).
It’s all to do with the design of the valve, springs in the valve (detent/return springs) bad seals in the pilot valve (or bad tolerances), or if it has a uni joint underneath. Make sure there is very little movement / clearance between the handle plate that contacts the valve-pilot plunger.
Im betting worn joint
14 pod243 // Jan 4, 2010 at 9:53 pm
Used Dozer
yes they do need to be tightened to end the problem
15 Bretty135 // Jan 7, 2010 at 8:22 am
Used Excavators
Vibrations from the engine.
16 cowbubbles // Jan 7, 2010 at 1:23 pm
Construction Equipment
do you have to grease the joysticks now lol
17 kimchiman1000 // Jan 9, 2010 at 6:01 pm
Used Excavators
Good question. I’m thinking both machines would have the same technology, but I’m not an expert. I know we have one 430 that has a bad chatter in the controls when using the crowd and boom up functions (as in grading) at the same time, while the other one has no such problem. The mechs at the Bobcat dealership cannot find anything ‘wrong’ with the controls though.
All I can do is shrug my shoulders.
18 WillieWonka928D // Jan 11, 2010 at 7:05 pm
Used Dozer
But, you know Al, I tired a 435 Excavator and the controls didnt shake like that. Would the model make a difference?
19 jcoole34 // Jan 12, 2010 at 4:59 am
Construction Equipment
That happen to me on a bobcat 1/4ton mini.
20 daewooparts // Jan 12, 2010 at 11:40 am
store
bobcat was purchased by the koreans and is now part of daewoo/doosan infacore.
21 daewooparts // Jan 14, 2010 at 2:50 pm
For Sale
l.o.l. stop puttin viagra in the fuel tank! :p
22 evshaw // Jan 16, 2010 at 11:28 am
Used Backhoe
heres ur problem its a bobcat designed for farmers and land scapers.. jk but that is funny i cant imagine why it would do that i wonder if its all of them or jst that one
23 kimchiman1000 // Jan 18, 2010 at 8:55 pm
Used Skid Steers
Thanks.
The control pattern has a lever to switch from one to the other.
Didn’t know the pressure was adjustable. I’ll pass it on to our sort of mechanic guy.
24 Spanrz // Jan 20, 2010 at 2:01 pm
Used Dozer
Try tightening up the hand control (replace the unijoint underneath) and change the pilot pressure.
If not, you have feedback in the pilot valve.
See if the dealer has seen or heard an update for these pilot valves. (check valve stuffed etc etc)
Did you, or have you manually changed the control pattern from the factory??
25 cowbubbles // Jan 23, 2010 at 9:34 am
Used-Dozer.Com
thats never happened to me
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