The South Wales resort has had an exclusive deal with Toro since the early 1990s and it has now added 11 new Workman MDX machines to its existing fleet of four.
Celtic Manor Resort director of golf Jim McKenzie revealed the 7,493 yard, par 71 course has been 100% Toro since 1993.
He said: "In that time we've never once used another make of machinery — we have such a good relationship with Toro, distributor Lely UK and our local dealer, Ted Hopkins Limited, that we'd never consider going elsewhere."
"(The MDX) are outstanding at moving equipment and materials around, particularly getting mowing equipment across The Twenty Ten Course.
"We've also bought 2 new heavy-duty Workman HDX utility vehicles, which we'll be using for topdressing the greens, spraying and fertiliser applications."
Celtic Manor will also be using Lely's special Toro tournament service to supplement its machinery needs come the event, which takes place from 1 to 3 October.
"We will be using the tournament support fleet and are discussing our needs with Lely and Toro," added McKenzie.
"But we're very fortunate here, having 3 courses — we have about £900,000 of equipment between them — so we can direct kit from the different courses according to our needs."
The tournament course is due to close on 6 September for final preparations for the 38th Ryder Cup.
A three-week break in play will be used for extensive maintenance with an extra 70 volunteers brought in to help the 40 staff.
McKenzie said the course would maintain its summer cut height for the tournament.
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