Dear Shravan Kumar,
In standard SAP it not possible to maintain info record for service, we can maintain service conditions for service master.
If you want to maintain conditions for service first maintain service master t code: AC01.
After creation of service master we can maintain service conditions with Vendor, Purchase organization, plant combination Tcode ML33,
2. With Vendor, Purchase organization without plant Tcode: ML39.
Even if we maintain info record for material group system will not pick info record for service POs.
Regards,
B V Yadav