Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Chinese site
cce client portal
Alatas on Facebook Follow Alatas on Twitter Follow Alatas on Google Plus Alatas You Tube Channel Alatas Linkedin
Change Slewing Bearing and load test Kyoritsu Kikai Provision Crane

The slewing bearing on the Stbd side Davit crane had failed. The provision crane, type Kyoritsu Kikai, SWL 0.9T x 6.6M was out of order for more than 2 years, as it was not possible to arrange a qualified crane service company that could arrange a crane bearing change-out on anchorage, and without the need for a shore based crane.

ALATAS proposal and solution was to lift-up the crane by means of a specially constructed and modular A-frame, that could be assembled on board without lifting aid.

Following work was carried out:

1. Assembled the A- Frame and shifted to STBD side from port side of vessel.
2. Placed A-Frame on top of crane and erected the staging around STBD crane pedestal.
3. Secured the crane by chain blocks (No crew available to assist).
4. Removed slewing bearing outer and inner bolts and nuts.
5. Removed the electrical cables from junction box 1 to slewing column.
6. Removed slewing gear box foundation bolts and slewing gear box.
7. Brought down damaged slewing bearing.
8. Cleaning bearing landing flanges by power brushing, on slewing column and on base column flange surfaces.
9. Applied new EP 2 grease to the new slewing bearing before installation.
10. Installed new slewing bearing (Customer supplied) tighten all inner and outer slewing bolts (415 Nm) by using Alatas supplied torque wrench.
11. Fixed back slewing gear box and electrical cables.
12. Tested operation, slewing lift/right limits, hoist up anti two block limit, witnessed by Class NK surveyor, Superintendent, Captain & Chief Engineer.
13. Measured new slewing bearing deflection with and without load.
14. Conducted load test and overload test (SWL 0.9 ton and proof load of 1.125 ton), as witness by superintendent and Chief Officer.
15. Dismantled A – Frame, Scaffolding, tools and materials.
16. Arranged all materials to be ready for offloading.

After being 2 years out of operation, the crane has been fully commissioned and re-certified by ALATAS and is ready again for unrestricted cargo operation.

ALATAS issued a full service report, including bearing axial clearance measuring protocol, crane load test protocol & crane certificate. ILO152 Form 2 is available as well.

Crane tilting because of collapsed slewing ring bearing
Provision Crane with damaged slewing bearing
Collapsed Roballo Slewing Bearing
Modular A-frame
Modular A-frame
Assembling A-frame
Rigging of A-frame
Rigging of A-frame
Rigging of A-frame
Lifting crane off from pedestal
Lifting crane off from pedestal
Damaged single row ball slewing bearing
Prepairing crane base column
Unpacking new Roballo Slewing Bearing
New slewing bearing ‘S” point.
New Crane Slewing Bearing Ring
Greasing of Bearing
Greasing of Bearing
Installing new slewing bearing
Installing new slewing bearing via A-frame
Crane repairs completed
Preparing pull load test
Crane function testing


Alatas Latest News
ILO 152 renewal and certification
Inspections and ILO 152 certification
Crane cabin replacement
Crane cabin replacement and general repairs
Liebherr crane luffing cylinder repairs
Liebherr CBW crane luffing cylinder replacements
Crane control system
Ship crane control system replacement
Hose replacement
Hydraulic hose renewal on Liebherr offshore cranes
Crane bumper bars protect lattice boom crane from hook strikes
Crane bumper bars protect lattice crane booms
Dock crane
Critical Dock Crane slew bearing repairs
Hagglund crane
MacGreor Hagglunds Gl2524-2 slew bearing replacementl
MacGregor crane rope sheave changeout
MacGregor crane rope sheave changeout
Searex crane
Commissioning of 210 tons Searex Omnilift Offshore Crane
Alatas Offices & Service Stations
Alatas UK Ltd - Head Office
Unit B, Olympic Park, Low Moor,
Bradford BD12 0LP
Tel: +44 1274 699222
Fax: +44 1274 699215
26 Abercrombie Court, Prospect Road, Arnhall Business Park, Westhill, Aberdeenshire AB32 6FE
Tel: +44 1224 797232
Houston Office, 22015, South Frwy.
Manvel, Texas 77578 USA
Tel: +1 281 431 0707
Fax: +1 281 431 0799
Riedemannstr. 2, 28239 Bremen
Tel: +49 421 / 61 94 184-0
Fax: +49 421 / 61941845
2203 Winning Centre, 29 Tai Yau Street, San Po Kong, Kowloon, Hong Kong
Tel: +852 2153 2153
Fax: +852 2153 2163
Carretera Carmen-Puerto Real Km. 14.5
Cd. Del Carmen, Campeche. México, C.P. 24157
Tel: +52 (938) 68 8 52 60
Fax: +52 938 110 6823
Jebel Ali Free Zone - South, P.O. Box 263 007
Dubai United Arab Emirates
Tel: +971 4 885 7954
Fax: +971 4 885 7229
Kjøita 6, 4630 Kristiansand,
Tel: +47 977 48345
Fax: +47 976 48345
c/o ALATAS Singapore
1 Int'l Business Park 03-01E
Tel: +63 917 349 5754
1 Int'l Business Park #03-01E
The Synergy, Singapore 609917
Tel: +65 6861 2336
Fax: +65 6861 6261
Recapital Buiding 5th Floor, Jalan Adityawarman Kav.55, Kebayoran Baru, Jakarta Selatan, 12160
Tel: +62 21 7247679
Fax: +65 6861 6261
No. 51, Lane 3226, Humin Road, Minhang District, Shanghai 201108
Tel: +86 (021) 6296 6612
Alatas on Facebook Follow Alatas on Twitter Follow Alatas on Google Plus Alatas You Tube Channel Alatsa Linkedin Share

© 2019 Alatas Worldwide Group | Privacy Policy


  You are here: Home > News > Change Slewing Bearing and load test Kyoritsu Kikai Provision Crane