Down
So a quick project today an older Hino tipper, these run a rather unusual PTO
pump and valve assembly in one,
so there's a driveshaft on the PTO (Power Take Off) on the gearbox which then runs
along under the truck, there's a support bearing here
to a pump here but it's actually a pump and valve combination which then goes up to a strange
rather unusual tipper linkage system
with a reservoir here built into the base of the cylinder
quite elaborate and a bit of a pain to maintain and repair and quite expensive
so we've done away with the PTO the shafts the pump and the valve, and we've gone to a
24 volt DC power pack with its built-in pump and reservoir
so there's a 24 volt power pack. You should never weld to a chassis rail it's not something
we would ever recommend I'm not quite sure who's done that but the damage has been done
chassis rails are high tensile steel and they should be riveted and bolted
using pre-drilled factory holes, welding to a chassis rail we'd never recommend and so
the beauty about this system it's a single hose goes up to the cylinder
solenoid valve here is the drop so it free flows through the pump with a check valve
and when you want to actually drop you energize this coil sorry for dropping oil comes back
through the same hose back into the tank so this is quite a cost-effective retrofit
to get everything up and running using a modern power pack
all-electric and you get rid of this very elaborate mechanical setup there
gets rid of all these pipes it's just a single hose
we're still going to use this reservoir because it does displace oil from the cylinder back into here
to keep the dry side of the cylinder lubricated so we'll just put a breather on there so
oil on the rod side of the cylinder can be displaced and keep everything well lubricated.
The Electrical system is relatively straightforward
main supply with a 24 volt system 200 amp fuse, yes these electric, little electric
motors it's actually a 2.8 kilowatt motor or a 2.8 kilowatt electric motor so they draw
quite a sizable amount of amps almost like a starter motor. So this is the installation
the positive cable goes all the way to the battery and the negative cable
needs a good Earth on the chassis you need a good earth otherwise you're not going to
transfer all those amps that the motor actually needs. And then in the cab its a rather dated model
but next to the pto switch which is now obsolete you've got an up button
and a down button which we will label so that he knows what's up and what's down
Hino FD
you