Yamaha 55DEHD Service Manual page 163

Gear pump .................................................................................................. 7-46
Disassembling the gear pump, down relief valve and main valve ......... 7-48
Disassembling the relief valve and manual valve .................................. 7-49
Checking the gear pump ....................................................................... 7-49
Checking the main valve ....................................................................... 7-49
Checking the manual valve ................................................................... 7-50
Checking the gear housing .................................................................... 7-50
Checking the reservoir ........................................................................... 7-50
Checking the filter .................................................................................. 7-50
Checking relief valve .............................................................................. 7-50
Assembling the relief valve and manual valve ....................................... 7-50
Assembling the gear pump .................................................................... 7-52
Tilt cylinder and trim cylinder ................................................................... 7-53
Disassembling the tilt cylinder and trim cylinder ................................... 7-55
Checking the tilt cylinder and trim cylinder ............................................ 7-57
Checking the valve ................................................................................ 7-57
Assembling the tilt ram .......................................................................... 7-58
Assembling the trim ram ........................................................................ 7-59
Installing the tilt cylinder ........................................................................ 7-59
Installing the trim ram ............................................................................ 7-60
Installing the PTT motor ........................................................................ 7-60
Installing the reservoir ........................................................................... 7-61
Installing the tilt ram .............................................................................. 7-61
Bleeding the PTT unit ............................................................................ 7-62
Bleeding the PTT unit (built-in) .............................................................. 7-63
PTT electrical system ................................................................................ 7-64
Checking the fuse .................................................................................. 7-64
Checking the PTT relay ......................................................................... 7-64
Checking the trim sensor ....................................................................... 7-65
6885J11
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