Hoist drive failed. Instructions for drive replacement are in the folder, however it is required to add +24 vdc to DQ+. This applies power to the hoist brake control relay.
See attached schematic. Typically, the dotted lines are optional, but this is required.
The new hoist frequency drives have only three speeds.
The Manitowoc hoist drive have five speeds.
Every HDT 80 with a serial number that starts with a 400 number has a override option. If you overload your crane and you can’t hoist up or down because you overloaded the crane hold the start button down while hoisting down.
While filling the washer bottle, all the fluid would leak out.
On the output side of each washer pump is a check valve.
to access the valves the A/C unit must be removed.
found that the check valves were broken and cracked, presumably from freezing. Replaced the valves ( toyota part # 85321-26020) and washer bottle stays filled.
HDT 80 When erecting or dismantle make sure you have slack in your hoist line while folding the jib. It does not have auto winding on the hoist drum so it can get supper tight and there is no limits to stop it. click on the link to see in the manual where you need to make sure you have slack in your cable. It is best to have about 10 ft of slack in your cable.
While erection and dismantle there is no limit switches that will stop you. Also there is no 125 limit for your hoist so you do not want to get your hoist rope tight at all or you will be bending and breaking stuff.
When setting up top site on a hup or pairing new slewing encoders there is a few more steps that you need to take that doesn’t explain in the manual. I have added some key notes in the top site chapter in the manual to get the job done. top site manual
Here are the screenshots, should the display fail
Rundown of relay to contactor logic
Contactor 34K1 controls valve bank coils.
Y1 Mast down
Y2 Mast up
Y3 Jib up
Y4 Jib down
Relay bank
36K1-5 relays
36K1 Mast down (34K1-Y1)
36K2 Mast up (34K1-Y2)
36K3 Jib up (34K1-Y3)
36K4 Jib down (34K1-Y4)
36K5 Control relay (supply)
Tried to erect 1589 and the jib would not raise. Checked hydraulic pump, and it was building pressure, but the coil to open the valve bank was not being activated.
Contactor was switching to open, but the control relay for the valve was bad.
Light would turn on the face of the relay, but would not actually switch. The orange screw could be turned to manually make the switch and the jib would go up. Replace relay.
