Technology and Operations
This forum is for discussing technological & operational matters pertaining to U-boats.
Re: About repairs/maintenance/overhauling the boat between the patrols
Posted by:
Eric Stone
()
Date: February 18, 2007 06:57PM
RC,
I was just reviewing the info on U-487 at www.uboatarchive.net and came across an actual example of repairs described as " The following translation of a note book from U-487, probably that of a Petty Officer or Warrant Officer, is presented for the purpose of showing every-day repair problems, work to be done at overhaul, precautions and directions."
It appears to have been a rough translation, but I thought you might find it useful.
Expelling bilge water at great depth 325 meters(?) or pressure (?)) blow center diving tank - diving bunker #5 - with 25 to 30 atmospheres. Upon surfacing close diving bunker, must be vented into ----(Illegible)
Do not let fresh water still - - - - (illegible)- - - - dry.
Overhaul (?) hydroplanes - stern
Drain periscope shaft continuously
at Z.d.M. 26 for refrigeration gauge vanes.
Condition A
Ventilating --motor circuit open in operating condition.
M 49344
Pressure reducer
Regulating valve on low pressure manifold
Main blowing
"Tyfun" hull valve - overhaul at yard.
Exchange CO2 measuring (Träger) apparatus.
Wrench for stuffing box, cooler for sharp freezer.
Flowers of sulphur
Packing for filter
1. Stern capstan, through hull - - - works hard
2. "Tyfun" hull valve in c/t.
3. Voice tube cock in c/t.
Depth gauge - grind in 200 cock
Pressure reducer control room forward.
Drill cooling vanes on switch shafts.
Open up inlet pipe main bilge pumping line bow compartment.
Center W.C. cock
Remove gear main bilge line in bow compartment.
Bow compartment - flap for hydroplane motor.
Sounding pipes trimming tanks fore and aft.
Weld on pipes in bow compartment.
Latch on oilskins locker - control room.
Wrench for stuffing box control room cooling.
Oil filter for port electric compressor.
Overhaul forward circulating ventilator at yard.
Raise stern compartment air inlet grill 10 cm.
Packing. Hull valve forward connection diving tank 8.
Pack fuel supply valve - control room.
Pack hull valves A-bunker gauging.
Blowing diving tanks 3 and 4.
Exchange 1 doz. pipe wrenches.
Move exhaust air grill in Warrant Officers' and Officers' mess and install new air inlet grill.
Grind in at yard venting of negative buoyancy tanks.
Renew luminous paint in boat.
Hand on stdb. trim gauge sticks.
Overhaul cut-off valve on pressure reducer.
Adjust safety valve on electric compressor.
Renew rubber gasket on cover of outboard motor container.
Overhaul rods on anchor capstan. Mount grease cup.
Overhaul bow compartment bulkhead.
Overhaul W.C. - hull cock leaks.
Overhaul main rudder
Water catcher over lathe.
Build three lockers each side, port and starboard, in workshop for spare parts for supplying.
New switch on grinder support.
Attend to clinometer dial removal appliance.
Gland for main rudder
Install drainage for level gauges on athwartships trimming tanks.
Mount handles on W.T. door.
Rebush gland for main rudder.
Overhaul steering gear. Thrust bearing noisy and gets warm.
Assorted sizes blank flanges.
Rubber rings for pressure reducer.
Hope this helps,
Eric
I was just reviewing the info on U-487 at www.uboatarchive.net and came across an actual example of repairs described as " The following translation of a note book from U-487, probably that of a Petty Officer or Warrant Officer, is presented for the purpose of showing every-day repair problems, work to be done at overhaul, precautions and directions."
It appears to have been a rough translation, but I thought you might find it useful.
Expelling bilge water at great depth 325 meters(?) or pressure (?)) blow center diving tank - diving bunker #5 - with 25 to 30 atmospheres. Upon surfacing close diving bunker, must be vented into ----(Illegible)
Do not let fresh water still - - - - (illegible)- - - - dry.
Overhaul (?) hydroplanes - stern
Drain periscope shaft continuously
at Z.d.M. 26 for refrigeration gauge vanes.
Condition A
Ventilating --motor circuit open in operating condition.
M 49344
Pressure reducer
Regulating valve on low pressure manifold
Main blowing
"Tyfun" hull valve - overhaul at yard.
Exchange CO2 measuring (Träger) apparatus.
Wrench for stuffing box, cooler for sharp freezer.
Flowers of sulphur
Packing for filter
1. Stern capstan, through hull - - - works hard
2. "Tyfun" hull valve in c/t.
3. Voice tube cock in c/t.
Depth gauge - grind in 200 cock
Pressure reducer control room forward.
Drill cooling vanes on switch shafts.
Open up inlet pipe main bilge pumping line bow compartment.
Center W.C. cock
Remove gear main bilge line in bow compartment.
Bow compartment - flap for hydroplane motor.
Sounding pipes trimming tanks fore and aft.
Weld on pipes in bow compartment.
Latch on oilskins locker - control room.
Wrench for stuffing box control room cooling.
Oil filter for port electric compressor.
Overhaul forward circulating ventilator at yard.
Raise stern compartment air inlet grill 10 cm.
Packing. Hull valve forward connection diving tank 8.
Pack fuel supply valve - control room.
Pack hull valves A-bunker gauging.
Blowing diving tanks 3 and 4.
Exchange 1 doz. pipe wrenches.
Move exhaust air grill in Warrant Officers' and Officers' mess and install new air inlet grill.
Grind in at yard venting of negative buoyancy tanks.
Renew luminous paint in boat.
Hand on stdb. trim gauge sticks.
Overhaul cut-off valve on pressure reducer.
Adjust safety valve on electric compressor.
Renew rubber gasket on cover of outboard motor container.
Overhaul rods on anchor capstan. Mount grease cup.
Overhaul bow compartment bulkhead.
Overhaul W.C. - hull cock leaks.
Overhaul main rudder
Water catcher over lathe.
Build three lockers each side, port and starboard, in workshop for spare parts for supplying.
New switch on grinder support.
Attend to clinometer dial removal appliance.
Gland for main rudder
Install drainage for level gauges on athwartships trimming tanks.
Mount handles on W.T. door.
Rebush gland for main rudder.
Overhaul steering gear. Thrust bearing noisy and gets warm.
Assorted sizes blank flanges.
Rubber rings for pressure reducer.
Hope this helps,
Eric
| Subject | Written By | Posted |
|---|---|---|
About repairs/maintenance/overhauling the boat between the patrols
|
Rosencrantz | 02/12/2007 08:50AM |
|
Re: About repairs/maintenance/overhauling the boat between the patrols
|
Ken Dunn | 02/13/2007 04:09PM |
|
Re: About repairs/maintenance/overhauling the boat between the patrols
|
Eric Stone | 02/18/2007 06:57PM |