HARRISBURG — Legislative leaders toiled Tuesday to keep a budget deal together amid partisan conflicts bubbling under the surface and lobbyists and rank-and-file legislators advocating for their pet projects in the $28.2 billion spending plan.

The worry for Gov. Ed Rendell and the dozen top lawmakers who struck the deal at 1 a.m. Monday is the four or five days it is taking to settle on dollar amounts for hundreds of programs, write the bills and bring them up for votes.

Each year, these days represent the last chance for scores of lobbyists and legislators to plug their spurned or forgotten causes in the state's massive budget.

Democratic Sen. Vincent J. Fumo of Philadelphia, a key budget negotiator, said he saw no problem yet that could erupt and undo the deal, which also involves billions of dollars in borrowing for bridges, water and sewer systems, alternative energy and more.

"We can hold it if we get it done this week. If we go farther than that ... ," Fumo said, his voice trailing off.

Through Tuesday, budget makers still had not distributed spreadsheets and charts to legislators or lobbyists specifying how the money is to be carved up among programs and school districts.

As part of the budget deal, hundreds of millions of dollars are being cut from the budget proposal Rendell issued in February and being shifted to causes that legislators favor.

While the dealmakers have publicized the broad outlines of the budget agreement, few specifics have emerged.

Matt Ehrhart of the Chesapeake Bay Foundation sought unsuccessfully to learn the fate of funding for programs that would help farmers prevent fertilizer from draining into waterways and polluting the bay.

A partisan dispute broke out in the wake of Monday's budget agreement after Republicans pushed for passage of a bill to continue a $1 billion, five-year subsidy that helps doctors and other medical professionals pay for supplemental malpractice insurance.

But Democrats said they had an agreement not to consider the measure until the fall, when the Legislature is supposed to deal with competing plans to help uninsured adults get primary health care. Democrats want the subsidy, nicknamed MCare, to wait until then because they want to tap a surplus in the malpractice subsidy and use it to support their health care plan.