Dee. Posted February 19, 2020 Share Posted February 19, 2020 Hi new to old Mack’s and cab overs how to open the cab?? Pump the jack it gets stiff but don’t move where’s the safety latch is their one?? Quote Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/ Share on other sites More sharing options...
carlotpilot Posted February 19, 2020 Share Posted February 19, 2020 22 minutes ago, Dee. said: Hi new to old Mack’s and cab overs how to open the cab?? Pump the jack it gets stiff but don’t move where’s the safety latch is their one?? mh has spring loaded saftey latches built into the hydraulics . if system is working right with pump control lever pointed toward cab it should raise . takes about a two foot pump handle 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-443149 Share on other sites More sharing options...
Vladislav Posted February 20, 2020 Share Posted February 20, 2020 Those hydraulic systems use to be leaky due to the age. Could be needing to add some fluid into the filling plug in the pump housing. Whan you put the control lever into the position as described above and start pumping the cab locks get off first under the cab airbags and than lifting cylinders start pushing the cab upwards. 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-443350 Share on other sites More sharing options...
ws721 Posted February 20, 2020 Share Posted February 20, 2020 Make sure the latches release while pumping. Also I have seen the shift linkage "stick". That would try to hold cab down. When I add fluid to the system I like ATF as it is easier to spot a leak and doesn't mind temperature extremes 1 1 Quote Remember if it's got a hood it's no good! Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-443355 Share on other sites More sharing options...
Vladislav Posted February 21, 2020 Share Posted February 21, 2020 Used ATF also works fine in a leaky cab hoist 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-443427 Share on other sites More sharing options...
Dee. Posted March 22, 2020 Author Share Posted March 22, 2020 Thank you one side had a leak so it was not fully unlocking Quote Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-446300 Share on other sites More sharing options...
Dee. Posted March 22, 2020 Author Share Posted March 22, 2020 On 2/21/2020 at 2:33 PM, Vladislav said: Used ATF also works fine in a leaky cab hoist Good to know thanks no more 6dollars a bottle jack oil 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61052-how-to-open-the-cab-on-a-87-mh613-cabover-help/#findComment-446301 Share on other sites More sharing options...
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